Theories of Regionalism

What is the theory that suggests that regions form as a result of economic and political cooperation among neighboring states?

Which of the following theories suggests that regions are formed based on shared cultural identities and values?

What is the theory arguing that power dynamics shapes conflicts and alliances?

Which theory suggests that regions are formed based on shared economic interests and interdependence?

According to this theory, regions are formed through a combination of economic, political, and cultural factors. What is this theory called?