Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions

The past fifty years or so have seen the gradual disappearance of animals from this earth, fishes from the sea, trees and plants from the land.

Many factors result in this unpleasant phenomenon. Among them, hunting is the main factor that endangers wildlife. Some people kill wildlife for sport. They take pleasure in collecting heads and hides. Yet others specialize in commercial hunting like killing whales.

Apart from this, the rapidly growing human population threatens wildlife on land, too. Towns expand and roads have to be built, so forests are burnt and trees are chopped down. It seems that man needs every inch of land within his reach, so he moves on to the natural habitat of wildlife. Tigers, lions and leopards slowly die off without the food and shelter that the forests provide.

In addition, rapid urbanization means industrial expansion. Very often, poisonous chemicals, industrial wastes and oil are dumped into the rivers and seas. Fish and birds are threatened.

Many depend greatly on animals for survival. He needs their flesh, hides and furs. Thus, man cannot do without wildlife; or he himself would become extinct. The public should be made aware that it would be better to shoot the animals with a camera than with a gun. In this way, they can preserve and help wildlife to continue living rather than to move all signs of it.

Man must learn to farm the sea as he does the land. He should regulate the amount of frequency of his catch. He should allow fish to breed and multiply before netting them. A man also needs to build forest reserves, and to pass a law prohibiting the killing of animals, especially those that already rare. To retain the present animal kingdom, the least that man can do is to clean the seas and rivers to prevent pollution. The cycle of nature is such that it forms a vicious circle. The insecticides and pesticides that we spray on crops can kill the birds and animals that feed on them. When a man eats these poisoned animals, he himself can die. We must therefore test the chemicals to be used before they are sprayed or it might mean the death of man!

Câu 3 : The author’s purpose in writing the passage is to__________.

A. explain the relationship between wildlife and human beings

B. call people’s attention to serious problems of pollution

C. explain how important wildlife is to human beings

D. call people’s attention to the protection of wildlife