Answer: 2) Enculturation
Step-by-step explanation:
Enculturation could be defined as when someone is able to learn the culture, behaviour and values of the society and begin to act like those people he stays around with. Alishan has stayed long enough in America that he's been able to behave like an American, learning their culture, values, behavior and everything you'll expect or want to see from an American, this is Enculturation.