Answer:
Social context
Explanation:
Social context refers to the physical environment around us that can influence the way we behave and think.
Let's take the case above for example.
People who raised in urban setting with a lot of siblings tend to get less attention from the parents, so more of them will grow up unconsciously craving for the affection/guidance that they do not get from home. The opposite condition would be felt by the person who grow up as an only child in rural area.