Final answer:
Amir attempted to assuage his guilt by seeking redemption and making amends for his past actions, particularly by confronting Assef and protecting Hassan's son, Sohrab.
Step-by-step explanation:
Amir attempted to assuage the guilt he felt by seeking redemption and trying to make amends for his past actions. One way he did this was by confronting Assef, the person who had harmed Hassan, and standing up for Sohrab, Hassan's son. This showed his loyalty and protective instincts towards Hassan's family, and helped him find some peace and forgiveness for himself.