In Dulce et Decorum Est, hags is used to describe young soldiers. The simile 'coughing like hags' was used because the young soldiers went into battle strong and full of life. After battle, they returned looking aged and beat down - hence 'hags' or resembling beggars.
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.