Death of a party to an agreement voids the agreement when the agreement is a(n)

The correct answer pertains to the nature of exclusive-right-to-sell listings in real estate, which are considered personal service contracts. These contracts are based on the specific skills, reputation, and relationships of the broker or agent involved. When one of the parties, typically the seller, passes away, the contract is rendered void because the obligation was contingent upon that specific person's involvement. Since the contract relies on the personal expertise and discretion of an individual, it cannot be fulfilled by another party.

In contrast, lease agreements and sales contracts can often be transferred or enforced even after the death of one party, because they typically involve an exchange of property rights rather than personal service. An executive contract, which can also involve personal services, may not always be voided upon death; it depends on the specific terms and nature of that contract. Therefore, in this context, the exclusive-right-to-sell listing stands out as the type of agreement that is voided upon the death of a party due to its reliance on individual performance and representation.