The answer is B: an individual or institution and the public.
Explanation for each option:
a.) A politician and the public - This option is too narrow. While public relations can involve politicians, it is not limited to them. Public relations encompasses a broader range of entities beyond just politicians.
b.) An individual or institution and the public - This is the correct answer. Public relations is fundamentally about managing the flow of information and fostering relationships between an individual or an institution (such as a company, organization, or public figure) and the public. This definition captures the wide scope of public relations activities.
c.) Two individuals - This option is incorrect because public relations typically involves communication between an entity (individual or institution) and a larger audience (the public), rather than just between two individuals.
d.) The public and a public figure - This option is also too narrow. While public relations can involve public figures, it is not limited to them. Public relations activities can involve any individual or institution seeking to communicate with the public.
In summary, public relations is about the development and flow of information between an individual or institution and the public, making option B the correct choice.