An efficient way to move toward the Nash equilibrium is called:

an agreement.

a principle.

a convergence.

a resolution.

a convention.

A convention

Explanation:

Nash equilibrium is a theory or a concept of equilibrium, which is in the game theory, where the possible result or the best outcome of the game and there is no incentive which could deviate from the strategy.

So, it is an effective way to move toward the Nash equilibrium is known or referred to a convention, which is a non - cooperative game.