Which of the following is not a convention of theatre? limited time and space strongly opposed forces unbalanced forces incentive and motivation?

The correct answer is "Unbalanced forces"

Explanation:

Theatrical Conventions are things which are done on stage that contributes to an overall performance style. It can also be called the rules of the game. Some of these conventions includes; Limited time, Sports analogy, Limited space, Incentive and motivation (rewards for the performance of great actions), A balance of forces, and strongly opposed forces (the protagonist of a play vs the antagonist). In all these, there is no unbalanced forces.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )