阅读短文，回答问题。

    Do you love animals? Animals are people's friends. They live in the wild. But nowadays, many animals in the wild are in danger, such as African elephants, pandas and blue whales. For example, in the past, there were many South China tigers, but now there are only about thirty in the wild. Some people kill these animals for money. And because of the changes of the environment(环境), some animals can't find enough food. We should do something to save these animals.