It is everyone's duty to help animals to stop extinction （灭绝）． As a student， there are so many things you can do yourself too! Please look at the following tips （建议） to help the endangered animals．

Send a letter to your local environment protecting center and show how you feel about the quick extinction of animals． Use the facts to write what you have found． Give some advice to the officers who make the strong rules to save animals．

Draw pictures and make a poster． Put this poster somewhere at school or where people will usually see it． Add some texts in the sign to make it clear why you care about the loss （丧失） of animals． It may encourage people to do something to protect the animals．

Avoid buying things that come from endangered species （物种）． When you travel， be careful about what you buy． You shouldn't buy things made from endangered animals or endangered tree species from forests that the animals live on．

Watch your diet． Before eating meals， you should see if you will break a food chain． If you see somebody doing something bad for the food chain， please stop him at once．

（1）Who make rules to save the endangered animals？ 　 　

（2）Where should we put the poster？ 　 　

（3）Is it right to buy a gift made of ivory （象牙） while travelling？ 　 　

（4）Why should we watch our diet？ 　 　

（5）What is the writer's purpose according to the passage？