Which of the following best describes a "special agent" in real estate?

A "special agent" in real estate is best defined as someone who acts on behalf of a client in a single transaction. This is a crucial role because it denotes a limited scope of authority compared to other types of agents. For instance, a special agent is typically hired to conduct specific tasks, such as representing a seller in the sale of a particular property. Their powers and responsibilities are confined to that specific transaction, and they do not manage ongoing business activities or multiple transactions.

This concept differentiates special agents from general agents, who are authorized to perform a broader range of tasks across ongoing dealings. The clear focus of a special agent's authority is what makes this definition the most accurate representation of their function in real estate.