Answer:
Structural functionalist theory
Explanation:
The structural and functional theory that sees the society as the structure that is interrelated with the functions and the biological needs of the society. There are many criticisms about this theory that it would not adequately explain the social change in society. There were powerful people have more power than less powerful people.
This theory has a circular nature. It defines the repeated behavior that called functionalism. So that this is the only theory that explains why people have different occupations and have different income levels. Many of the sociologists told that this was unfair because of some powerful people.