This question is confusing
A) they needed to feed the population and to trade
Answer:
Roman religion was centred around gods and explanations for events usually involved the gods in some way or another. The Romans believed that gods controlled their lives and, as a result, spent a great deal of their time worshiping them.
Short Answer:
The romans beleived the gods were the controller of lives.
I believe the answer is: Integrative theory
Integrative theory view that society could never be exist unless each individuals fulfill their own roles. These happen because humans are unique in terms of our talent/capabilities. So in order to crate a well functioning society, different humans had to integrate our different capability to operate it.