What type of agreement establishes a principal-agent relationship where the real estate professional acts on behalf of the buyer?

The Buyer Representation Agreement is the correct choice because it specifically establishes a legal relationship in which a real estate professional acts as an agent for the buyer. This type of agreement outlines the responsibilities and obligations of both the real estate professional and the buyer, ensuring that the agent is legally committed to representing the buyer's interests during the property search and transaction process.

In contrast, an Exclusive Listing Agreement is used when a seller hires a real estate professional to market and sell their property, which does not pertain to a buyer's representation. An Agency Contract is a more general term that encompasses various types of agency agreements, including those for buyers and sellers, but does not specifically indicate its focus on representing buyers. Lastly, a Sales Agreement is a contract that outlines the terms of the sale of a property once a buyer and seller have reached an agreement, and it does not establish the agent's role in representing either party prior to that point. Thus, the Buyer Representation Agreement is uniquely focused on designating the agent as an advocate for the buyer in the real estate transaction.