Which of the following terms describes a contract that cannot be enforced?

The correct answer is a void contract. A void contract is one that is not legally effective or enforceable from the moment it is created. This can occur for various reasons, such as the parties involved lacking the legal capacity to enter into a contract, the contract being for an illegal purpose, or it violating public policy.

A void contract differs from a valid contract, which is legally binding and enforceable. It also differs from other terms like non-binding agreements or invalid agreements, which may imply that while the intent was there, they don't meet the necessary legal standards to hold any authority. A void contract, however, is considered null and has no legal weight or effect right from its inception.