Final answer:
The Food and Drug Administration (FDA) enforces the Federal Food, Drug, and Cosmetic Act (FCSA), ensuring products' purity, effectiveness, and truthful labeling. The Federal Trade Commission (FTC) deals with consumer protection and market competition.
Step-by-step explanation:
The question refers to which agency enforces the Federal Food, Drug, and Cosmetic Act (FCSA). The correct answer is the Food and Drug Administration (FDA). The FDA is empowered by the United States Congress to enforce the FCSA and other laws, such as Section 361 of the Public Health Service Act. Their responsibilities include ensuring the purity, effectiveness, and truthful labeling of food, drugs, and cosmetics, and inspecting the production and shipment of these products.
Additionally, the Federal Trade Commission (FTC) is the agency that would be involved in the enforcement of issues related to consumer protection, such as deceptive or manipulative business practices. Instant communication technology has also prompted the involvement of agencies like the FCC (Federal Communications Commission) for regulatory oversight. The FTC works to protect consumer interests and maintains competition in various economic sectors.