The correct answer is B. A person who publicly supports an idea
Explanation:
Being an advocate means you publicly support, approve and defend a specific belief, proposal, cause or activity; for example if you are an advocate for vegetarianism this means you support the idea of not eating meat or any product derived from animals. This term is also related to "advocacy" that refers to all activities of an individual or organization to promote the belief, proposal or cause they support. In the same way, advocating for healthful activities means you believe healthful activities are necessary or positive and show your support publicly to try to convince others Thus. the statement that describes a person being an advocate is "A person who publicly supports an idea".
