Final answer:
Amir asks Soraya to not tell her parents about Sohrab's origins in order to protect Sohrab from potential discrimination and social consequences.
Step-by-step explanation:
In the novel, 'The Kite Runner' by Khaled Hosseini, Amir asks Soraya not to tell her parents about Sohrab's origins because he is concerned about the stigma and discrimination Sohrab might face. Sohrab is the son of Hassan, who is a Hazara, an ethnic minority in Afghanistan. In Afghan society, Hazaras are often marginalized and discriminated against.
If Sohrab's origins were revealed, it could lead to social and familial consequences for him, including discrimination and prejudice. Additionally, Amir is also afraid that revealing the truth could prevent him from fulfilling his wish of adopting Sohrab and providing him a better life in America.
By keeping Sohrab's origins a secret, Amir hopes to protect him from the potential hardships he might face because of his ethnicity and upbringing.