Animals, including insects, don't have a "language" like ours. They do not 'talk' to each other in words and sentences. But if we watch them, we can see that they do have their ways of communicating with each other. Can you see the rabbit's tail? When rabbits see this white tail moving up and down, they run away. They know that they are in er. The rabbit has told them something without a sound. It has given them a signal. Many other animals use this kind of "language". When a cobra ( 眼镜蛇 ) is angry, it raises its head and makes itself look powerful. This warns other animals. When a bee has found food, it goes back to its home. It cannot 'tell' the other bees where the food is by speaking to them, but it does a little dance. This tells the bees where the food is. Some animals "say" things by sounds. A dog barks, for example, when a stranger comes near. A cat purrs when it is pleased. Some birds make several different sounds, each with its own meaning. Sometimes we human beings speak in the same way. We make sounds like "Oh" or "Ah" when we are frightened or pleased or when we drop something on our toes. 1. Which one is TRUE according to the passage?