The purposeful reliance by one service on another service's capabilities to maximize complementary and reinforcing effects of both (i. e., synergy) is known as

Joint Interdependence

Explanation:

Joint Interdependence  is defined as the dependency of a particular service on other services to obtain and create synergy for increasing effect of reinforcement and complement.  

This interdependence helps in reduction of exploitation due to weak service and function. Benefits are obtained in joint form for every involved party through this purposeful path.

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

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i want to say death; parole, probation, and fines are still being used all the time.