Passage: Roaring, the tiger said worriedly, “these human beings think a tiger ought to do nothing except to sit around and roar round the clock. If they find me peacefully asleep, they throw stones at me. They try to make me angry so that I can roar at them.” Hallu, the gibbon said gravely, “Horrible! Just horrible! I have had the same experience myself. I am the most popular animal in the zoo. A large crowd gathers outside my cage. I love yelling and screaming especially for the little children who come to see me. But two weeks ago when they sent my best friend Rolu to another zoo, I began to feel so lonely that I could not bring myself to laugh, leap or dance. Naturally the people who came to see me were disappointed”. Question: Hallu, began to feel lonely because—