The answer that best completes the statement above is the second option: Hassan’s loyalty to Amir. The Kite Runner, written by Khaled Hosseini, is actually an novel about Amir. And in this novel, the kite here symbolizes the childhood bonding between Amir and Hassan and at the same time, this also shows Amir's betrayal to Hassan. Amir has been carrying this guilt and has been trying to avoid it.