SYMBOLS AND PARALLELS
Baba's decrepit house = representation of how the nation as a whole has become ruined, with little to no trace of its former legacy
The Lamb = a sacrifice of the innocent made in all Abrahamic religions. Both Hassan and Sohrab are described as having lamb eyes
Amir's Harelip = everything coming full circle
Foreshadowing--when Hassan tells Assef he will end up as "One-Eyed Assef" and his son ends up fulfilling his promise.
The past recreates itself in the scene with Assef, Sohrab, and Amir, which mirrors the rape scene that has defined the book. Once again, Amir is faced with same choice and must decide if he can do the right thing this time.