Read the following passage carefully and answer the questions that follow:

An old lion who was too weak to hunt or fight for his food, decided that he must get it by his wits. He lay down in a cave, pretending to be ill and whenever any animals came to visit him, he seized and ate them. When many had perished in this way, a fox, who had seen through the trick, came and stood at a distance from the care and inquired how he was. 'I would have come in', said the fox, "but I saw a lot a tracks gowns in and none coming out'. a) Why didn't the lion hunt for his food?