The positive quality that Caliban possess is that he speaks poetically when describing his island.
The correct option is A.
Caliban was the only inhabitant of the island where Prospero and his daughter Miranda had taken refugee. He was the son of the witch-hag and the earthy servant of Prospero. In the first Act of the play, Caliban is seen accusing Prospero of stealing his native land and making him the slave in his own land. Prospero was the one who had taught him to speak. He uses this ability to curse Prospero. Prospero controls him by giving him harsh punishments and difficult jobs in return for his bad behavior.
