Final answer:
Amir gives Wahid's sons money to help their family financially, which shows his sense of responsibility and appreciation for their hospitality.
Step-by-step explanation:
The question pertains to a moment in Khaled Hosseini's novel The Kite Runner, where the protagonist, Amir, gives something significant to the sons of Wahid, a character that shows Amir hospitality. The correct answer is D. His money, which Amir gives to help Wahid's family financially. The action is significant because it highlights Amir's growing sense of responsibility and his desire to contribute positively to the lives of others, as well as showing his appreciation for the family's generosity despite their own poverty.