生物多样性的内涵很丰富，包括三个方面：生物种类的多样性、____ 的多样性、____ 的多样性．

Rainforest also help to ____   the weather. When trees are cut down, it gets hotter. Besides, one quarter of our ____  come from plants. Many of these plants can be found only in rainforests. There is a lot that we have not learnt about rainforests. If we____ them, we will never find out.

In my opinion, our future____ saving the rainforests. We must tell more people how important rainforests are so that they will stop doing harm to them. We must protect the rainforests now. We have to act now to save our only home.

在果树开花季节，如果遇到阴雨连绵的天气，常会造成果树减产，主要原因是（　　）