Social theories that explain social change as a process moving from a less complex society to a more complex society are known as

a. theories of mechanical solidarity.

b. theories of organic solidarity.

c. evolutionary theories.

d. functionalist theories.

C. evolutionary theories.

Explanation:

According to revolutionary theories, organisms have the tendency to passed on the better genes to the next offspring. So over time, those organisms will be evolved into a more advanced version of themselves.

This theory can be used to observe our society.

Humans used to live very primitively. Our activities are limited to hunting and gathering food. But as we goes forward, their offspring keep getting smarter and smarter. This enable them to develop a more complex way to survive, They utilize technological invention to make their life better. This is why society keep changing to a more complex form.