What does F.D.A. stand for?

The correct answer is "Food and Drug Administration." This agency, commonly known by its abbreviation FDA, is a significant part of the U.S. Department of Health and Human Services. Its primary responsibility is to protect public health by ensuring the safety, efficacy, and security of food, drugs, biological products, and medical devices. The FDA also plays a critical role in regulating the nation’s food supply and overseeing the compliance of certain products with government standards to ensure they are safe for consumer use.

The other options, while related to the area of food and drug regulation, do not accurately reflect the formal name of the agency. "Food and Drug Agency" is a common misnomer but does not incorporate the correct term “Administration.” The term "Federal Drug Association" does not exist in the context of U.S. health regulation and is not associated with the FDA. Lastly, "Food Distribution Authority" sounds plausible but does not pertain to the regulatory functions or responsibilities that the FDA has concerning food and drug safety. Understanding the proper designation of the FDA helps clarify its important role in public health policy and consumer protection.