请认真阅读下面短文，并根据各题所给首字母的提示，写出一个合适的英语单词完整、 正确的形式，使短文通顺。 Most people love animals. We think that animals are good (1) f_________ of humans. But, in fact, a 1arge number of animals, especially wild ones, are in (2) d_________ now mainly because of humans. If we do not (3)t_________ action now, we will have no animals soon. People are destroying animals' natural habitat by cutting (4) d________ trees or building houses. At the same time, many of the animals' living (5) a_________ are becoming farmland as we have to feed a 1arger population of the world. Besides, people hunt animals for their fur or other useful things. As a result of the pollution that humans have caused, some animals cannot (6) l_________ a normal life any more. We must try our best to (7) p_________ animals right now. Remember that it is everyone's (8) d_________ to do so. We should write to newspapers and magazines and (9) t_________ everyone about these problems. We should also immediately (10) d__________ something to help the endangered animals.