Answer:
Amir has a rich background while Hassan has a poor background.
Explanation:
The descriptions of Amir's possessions are those of a person who is rich. He has a magnificent house and he has a red brick driveway which also suggests that he also owns cars. This implies that he must be rich or that he must come from a rich family because it is only a rich person that can afford to own these things.
Hassan on the other walks towards a little mud hut which also implies that he must come from a poor and humble background.