Answer:
Family/Parents
Step-by-step explanation:
Agent of socialization refers to a group or individual that has the power to influence the behavior of other people so they can conform to the standard that applied within the society.
The first agent of socialization that teach us about such social rules would be our Family. When we're children we cannot read the laws or understand big social issues by ourselves. During this time, all of our knowledge regarding what socially right or wrong were taught by our parents.