Animals have a natural ________ for survival.A extinctionB distinctionC institutionD in

Some animals______well enough in that country.A．have not protectedB．is not being protected

Since prehistoric people first applied natural pigments to cave walls, ______ have painted

This rule may have preserved the shark from being eaten as well as other animals ______.A．

Some species of animals have become extinct because they could not ______ to the environme

In the long history of natural evolution,many kinds of animals have______from the earth.A．

We have made up laws to protect the water from being polluted and the animals _____