What is the typical feature of a contract that has a fixed amount?

A contract with a fixed amount is characterized by its stability under predetermined conditions, meaning the agreed sum remains unchanged regardless of external factors or circumstances that may arise during the contract's term. This feature provides certainty and predictability for both parties involved in the agreement, allowing for clear financial planning and expectations.

In contrast, the other options suggest variability or specific conditions that don’t apply to fixed amount contracts. For instance, an adjustable contract would fluctuate based on market conditions, while contracts that involve increasing benefits would typically include provisions for growth or escalation linked to an index or other criteria. Lastly, a contract that covers only specific risks suggests a limited scope, not aligning with the broad application or stability that a fixed amount entails. Thus, the defining trait of a fixed amount contract is its unwavering agreement despite potential changes in the environment or context.