Which source is the most relevant, credible, and valid for a student writing a research paper on healthy eating habits?

The Food and Drug Administration is an authoritative source, and its chart gives direct information about recommended portion sizes, which is relevant to healthy eating habits. The gymnast’s personal routine may not apply to most people, while the cartoon is meant to persuade rather than provide reliable data. The teacher’s graph may be useful, but the question gives no information about how its data were collected or verified.

AI-written and checked against the verified answer.