Dear Tom,
You have asked me to tell you something about tigers.Here are what I want to tell you.
First of all,tigers live in forest and feed on small animals.Nowadays,there are fewer and fewer tigers in the world,and they are even endangered.Many reasons cause the phenomenon.For example,people kill them for their bones to make medicine,which can make great profits.Lacking of food also affects their numbers.What's more,people destroy their habitats and pollute the environment further cause their decrease of number.
In conclusion,tigers are our friends,we should protect them.