Which type of agent is under contract with a single insurer?

The correct answer is exclusive or captive agent. This type of agent operates under a contract with a single insurance company, which means they represent that company and only sell its products. The relationship allows these agents to have an in-depth understanding of the products and services of the insurer they represent, enabling them to provide specialized service to clients based on that company's specific offerings.

In contrast, independent agents work with multiple insurers and can offer a wider range of products from different companies, while insurance brokers also represent buyers and have access to various insurance carriers but do not have a contractual obligation to any single one. General agents may operate similarly to independent agents, but they often have a broader authority or a larger network of agents under their guidance and may also represent multiple insurers.