What is the best description of the relationship when a broker finances a project with exclusive selling rights?

The description that fits best when a broker finances a project while holding exclusive selling rights is "agency coupled with an interest." This relationship is characterized by a broker having a financial stake in the project, which typically grants them certain privileges and motivations to act on behalf of the client's best interests. The exclusive selling rights establish the broker’s authority to represent and sell the property, while the financial involvement creates a depth of commitment toward ensuring the project's success.

In contrast, "specific agency" would involve a broker being authorized to act on behalf of a client for a specific transaction or purpose without an ownership interest, making it less relevant when financing is involved. "General agency" refers to a broader scope of authority where the agent can act on behalf of the principal in a variety of matters, but it does not specifically address the aspect of financing. "Exclusive agency" typically indicates a situation where the agent has the exclusive right to sell a property, but it lacks the element of having a financial interest in the project, which is pivotal in this context.