Final answer:
Conflict theory posits that social behavior is driven by the competition between groups for resources and power, and it contrasts with the stability-focused functionalism.
Step-by-step explanation:
The theory that assumes social behavior is best understood in terms of tension between groups over power or the allocation of resources, including housing, money, access to services, and political representation, is known as Conflict theory. This theoretical framework is rooted in Marxism and posits that society is in a state of perpetual conflict due to competition for limited resources. In opposition to Functionalism, which focuses on the stability and interdependence of societal systems, Conflict theory focuses on the struggles between various social classes that result in societal change and development.