Corrected version:

The majority of people engage in illegal hunting of wild animals across the world, and this may affect the environment.

Explanation: 

"Majority" should be preceded by the article "the" to indicate a specific group of people. "Effect" should be changed to "affect" as it is a verb indicating a change or influence on the environment.

Improved version:

The illegal hunting of wild animals is a widespread practice worldwide, causing significant harm to the environment and ecosystems.

Corrected version:

Nowadays, developing countries engage in poaching, which involves the illegal hunting of natural habitats. This may cause harm to the environment.

Explanation: 

"Do poaching" should be changed to "engage in poaching" to indicate the action of participating in the activity. "Illegally hunting" should be changed to "the illegal hunting" to clarify that it is the act of hunting that is illegal, not the habitat itself. The verb "harm" should be followed by the preposition "to" to indicate the recipient of the harm.

Improved version:

Developing countries are increasingly participating in poaching activities, which involve the unlawful hunting of animals in their natural habitats, further exacerbating the negative impact on the environment.

Corrected version:

A significant number of people engage in hunting to sell animals in the market at a high price. They kill camels and tigers to make various products such as shoes and purses. They kill animals for food and to maintain their health, but this may cause severe problems such as disruptions in the food chain.

Explanation: 

 "Do hunting" should be changed to "engage in hunting" to indicate the action of participating in the activity. "For sell them" should be changed to "to sell animals" to clarify the purpose of the hunting. "Kill" should be changed to "they kill" to specify the subject of the sentence. "Different kinds of product" should be changed to "various products" to indicate a range or variety of items. "Also" should be changed to "and" to indicate the conjunction between two purposes. "Like disturbance in food chain" should be changed to "such as disruptions in the food chain" to provide specific examples of the severe problems.

Improved version:

The illegal wildlife trade is driven by the demand for high-priced animal products, such as shoes and purses made from the skins of camels and tigers, leading to the depletion of these species and disrupting the delicate balance of the food chain.

Corrected version:

Nowadays, a large number of people watch films or movies. In movies, actors kill many species, and as a result, a great many people also try to kill animals. Movies show many instances of illegal hunting of wild animals to attract people, including children who may be attracted to these movies and subsequently engage in animal killing.

Explanation: 

"Are watching" should be changed to "watch" to indicate a general present tense action. "And to see that" should be added to indicate the cause-and-effect relationship between actors killing species in movies and people trying to kill animals. "Movies shows" should be changed to "Movies show" to indicate the correct subject-verb agreement. "Also" should be changed to "including" to indicate that children are part of the group of people being attracted to the movies. "They also kill animals" should be changed to "and subsequently engage in animal killing" to clarify the cause-and-effect relationship.

Improved version:

The depiction of illegal hunting in movies and films can attract a large audience, including children, who may be influenced to engage in animal killing activities, perpetuating the harmful cycle.

Corrected version:

A significant number of people are not aware of these issues. This may have an effect on the food chain. If they kill species, it may cause disturbances in the food chain and create difficulties for both the food chain and human society. Killing animals for food may have an effect on the environment and natural habitat.

Explanation: 

"These things" should be changed to "these issues" to provide a more specific and clear reference to the lack of awareness. "Effect on" should be changed to "have an effect on" to indicate the impact or influence on the food chain. "It may disturbance" should be changed to "it may cause disturbances" to indicate the result or consequence of killing species. "Make difficulties" should be changed to "create difficulties" to provide a clearer and more accurate description of the impact on the food chain and human society. "Effect on" should be changed to "have an effect on" to indicate the impact or influence on the environment and natural habitat.

Improved version:

Lack of awareness about the consequences of illegal hunting and its effects on the environment and food chain can result in severe disruptions to both ecosystems and human society.

Corrected version:

For instance, if hunting only hens, this may have an effect on the food chain, and a large number of species may become extinct. This may have detrimental effects on human society. 

Explanation: 

"If hunting only a hen" should be changed to "if hunting only hens" to indicate the plural form of the animal being hunted. "May effect" should be changed to "may have an effect" to indicate the potential impact or influence. "Are become extinct" should be changed to "may become extinct" to indicate the possibility of species becoming extinct. "Effect an detrimental problems" should be changed to "have detrimental effects" to indicate the negative consequences or impacts on human society.

Improved version:

The hunting of animals for food can have detrimental effects on the environment and natural habitats, especially if specific species like hens are targeted, potentially leading to their extinction and causing further imbalances in the food chain.

Corrected version:

Furthermore, a great many tourist attractions may not be present in that country. People travel to different countries to see natural habitats. 

Explanation: 

"Were not coming" should be changed to "may not be present" to indicate the potential absence of tourist attractions in the country. "Go different countries" should be changed to "travel to different countries" to indicate the action of visiting or exploring other countries.

Improved version:

The loss of wildlife due to illegal hunting can also impact the tourism industry, as natural habitats are often a key attraction for travelers seeking to experience and appreciate the beauty of different countries.

Corrected version:

In conclusion, it can be seen that hunting wild animals may harm both species and human society. 

Explanation: 

"To conclusion" should be changed to "In conclusion" to indicate the final statement or summary. "As well as" should be changed to "both" to provide a clearer and more concise description of the harm caused to both species and human society.

Improved version:

In summary, illegal hunting of wild animals poses significant threats to both species and human society, with far-reaching consequences for the environment, food chain, and tourism industry.