Answer:
Unilateral contract
Explanation:
An unilateral contract is a contract that can only be enforced when the performing party performs the action that he agreed upon. It is only when this actions is completed, that the offering party is obliged to make a payment.
In this case, your boss has offered $75 if you clean the pool. This is an unilateral contract because your boss is only obliged to pay that money once you finished cleaning the pool. If you never clean the pool, you simply will not receive the $75.
