Final answer:
The bargaining strategy for zero-sum conditions is called distributive bargaining, where one party's gain is the other's loss, echoing a prisoner's dilemma where both participants are likely to defect.
Step-by-step explanation:
The bargaining strategy that operates under zero-sum conditions, where the gain of one party is exactly equal to the loss of the other, is referred to as distributive bargaining. This type of strategy is akin to dividing a pie; the larger the piece that one party gets, the smaller the piece for the other party. This is opposed to integrative bargaining, which is a win-win situation where parties collaborate to expand the pie, so to speak, to create mutual benefits. In the context of the provided information, a prisoner's dilemma often illustrates the difficulty in achieving cooperation as logic suggests both participants will opt to defect to ensure their own best possible outcome, rather than take the risk associated with cooperation.