We concluded our study of the novel today by examining Buck's character as an uber being,neither dog nor wolf. Physically he is larger and mentally more cunning and strategic. Only by learning love and loss does Buck evolve. We noted how in this way the novel ends on an optimistic note suggesting that human society can and will also evolve. Colson discussed how Buck returns each year to the site of Thornton's murder and at the end of the novel is the leader of the wolf pack. He then completed comprehension questions in writing . HIs sentence structure has shown significant improvement .