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.

The ability to remain steady on your feet

Explanation:

The word stability has to do with balance, it's a state where someone is trying to gain strength to stand or gain a balance. It has it's application in various field but all points to gaining balance on a platform