Read the passage and answer the question that follows. A donkey and a rooster lived peaceably together in the farmyard. One day, a hungry lion passed by. His eyes brightened at the sight of the plump donkey, and he thought of the fine meal in store for him. But just as the lion was about to pounce on the donkey, the rooster began to crow. Now, it is said that nothing a lion hates more than the sound of a cock-a-doodle-doo. Perhaps, it is true, for the lion turned fled at the sound of the rooster’s crowing. The donkey laughed. “Why, the lion is a coward! The mighty king of beasts runs from a rooster.” And donkey felt so bold that he began to chase the lion. He had not gone very far, however, when the lion turned. With a great roar, he leapt upon the donkey. The rooster, watching from the farmyard, she sadly, “Alas! My poor friend did not realise what he could not do.” “False confidence often leads to misfortune.”
Why did the donkey chase the lion?