A member of the National Association of Realtors is referred to as a:

A member of the National Association of Realtors is referred to as a Realtor. This designation is specifically for real estate professionals who are members of the NAR and adhere to its strict code of ethics. By being a member, these individuals demonstrate their commitment to professionalism and integrity in their practice.

While terms like broker and agent are commonly used within the real estate industry, they do not convey membership in the NAR. A broker is someone licensed to operate their own real estate business and supervise agents, while an agent typically works under a broker's license to facilitate real estate transactions. The term negotiator, although related to the real estate process, isn’t a formal title recognized within the industry like Realtor is. Thus, the correct answer highlights the importance of the NAR membership and the ethical standards associated with the title of Realtor.