Answer: unilateral contract
Step-by-step explanation:
An unilateral contract is a contact that is formed when an individual offers to do a particular thing in return for either money or something else that was agreed on.
Once such individual does that thing, he or she has to be given what was agreed on in the contract. A typical example is the contact regarding an insurance policy.
Therefore, an offer that can only be accepted by an offere's performance will create a unilateral contact.