The belief that the health-care industry has four interrelated economic functions in capitalist society (accumulation of capital, provision of investment opportunities, absorption of surplus labor, and maintenance of the labor force) is most closely associated with the perspective

conflict  

Explanation:

Conflict perspective: In sociology, the term "conflict perspective" is considered as one of the important sociological frameworks, and was proposed by a famous sociologist named Karl Marx. The conflict perspective states that a specific society struggles for power between different groups and engages in conflict-related to the limited resources.

In the question above, the given statement represents the conflict perspective.