A social institution is a part of the societal order and is formed by a group of people having a common objective.
It governs the way individuals behave and whatsoever they expect.
It can be regarded as the societal structure that takes care of the requirements of the society and helps in building up the society.
Thus they provide a set of rules and norms of the behavior of individuals forming the society and these rules are internal to the society as they are used to govern a specific society.
Explanation: The correct answer is letter D, Self-Actualization. In Maslow's theory there are lots of motives that urges a person to do something to satisfy it; in this case, everything related to extend or use your full potential and perfect yourself is known as a Self-Actualization motive.
The following sequence of events shows how Mesopotamia developed: People settled where crops could grow. The population grew. Villages and cities formed.
