动物所进行的一系列有利于它们存活和繁殖后代的活动，都是动物的行为．动物的行为往往表现为各种各样的运动．请回答下列有关动物行为的问题．

阅读短文B，回答问题。

    We are in a world full of competition. Our parents compete（竞争）with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition. Why can't we do better than others? One important reason is that we have no self -confidence.

    In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other ways. So everyone has his or her own advantages. Don't look at things from a single point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.

    Competition is not so terrible. Don't be afraid of it. And don't be afraid of those classmates who are better than you. Remember that the first step to success is self-confidence. Believe in yourselves, and you will be successful.

   My name is Chen Lan. My home is in Gulangyu. Do you know it? It is in Xiamen. It is near the sea(海). Gulangyu is a small place，but it is very nice and clean. There are no cars，no buses. People only walk. So it is very quiet.
   Our house is in the middle of Gulangyu. Behind our house there is a big old tree. My grandfather tells me that the tree is very，very old. There are many birds in the tree. We call it a “bird tree”. Our house is near the sea. The sea is big and blue. There are a lot of fish in the sea. After school，I go there and catch(捉) fish with my friends. It is very interesting. I like fish and I like catching fish.