Which of the following is true of an addendum to a contract?

An addendum to a contract serves as an attachment that adds or further describes the rights and duties of the parties involved. It is essentially a written supplement to the original contract that modifies, clarifies, or provides additional terms without altering the original agreement's validity. By including an addendum, parties can make necessary adjustments or include additional information that was not part of the initial contract, ensuring all terms are clearly outlined and agreed upon.

This understanding emphasizes the function of an addendum as a tool for providing clarity and detail, which can be crucial for the smooth execution of the contract. While other choices address different aspects of contracts, they do not accurately convey the specific role of an addendum in contractual agreements. For example, the concept of a contingent provision relates to a condition that must be met for a contract to be enforceable, but this does not define what an addendum is. The term "synonymous with contingent" also diverges from the nature of an addendum, which does not imply a conditionality but rather an extension of existing terms.