Which of the following best describes the function of the FDA?

The function of the FDA, or the Food and Drug Administration, is primarily focused on regulating food and drug safety. This includes overseeing the safety and efficacy of food products, medications, vaccines, and medical devices. The FDA ensures that these products meet certain standards before they can be marketed to the public, thereby protecting consumers from unsafe or ineffective products.

In addition to this, the FDA is responsible for monitoring the labeling and marketing of these products to ensure that consumers are informed and protected. This clear focus on the safety and regulation of food and drugs highlights the FDA's critical role in public health.

The other options pertain to functions that fall outside the FDA's purview. Monitoring workplace safety standards relates more closely to organizations like OSHA (Occupational Safety and Health Administration). Managing employee health conditions typically falls under human resources or occupational health departments, not a regulatory body like the FDA. Ensuring proper inventory turnover is a business management responsibility and does not align with the FDA's regulatory scope. Thus, the emphasis on food and drug safety makes this answer the best description of the FDA's function.