Answer:
The correct answer is Heredity.
Step-by-step explanation:
When we talk about the social environment, we are referring to the social and cultural conditions in which a person was raised or lives, including the people around him.
This includes culture, family and friends, but does not include heredity.
In this case, heredity is something biological that is transmitted from parents to children, and is not something that is part of a person's social environment.
Therefore what is not part of your social enviroment is heredity.