Which of the following describes a condition in a contract?

A condition in the context of a contract refers to a fundamental term whose fulfillment is crucial for the contract's performance. When a condition is described as essential, it indicates that the contract relies on this term for its validity; if the condition is not met, it can lead to the termination of the contract and potential damages. This emphasizes that conditions are not merely guidelines but core elements that determine the parties' rights and obligations.

In contrast, the other options do not align with the definition of a condition. A term that has lesser significance compared to a warranty suggests a secondary importance, while a suggestion open for negotiation implies flexibility, which is not the case with conditions. Additionally, a promise made without legal obligation does not capture the essence of a condition, as conditions, by definition, carry legal weight and enforceability within the contract framework.