Final answer:
The primary function of the FDA is to regulate and supervise various aspects of public health, including food safety, medical devices, drugs, and disease monitoring.
Step-by-step explanation:
The primary function of the Food and Drug Administration (FDA) is to regulate and supervise various aspects of public health. This includes ensuring food safety and quality, regulating medical devices, approving new drugs, and monitoring the spread of diseases. The FDA plays a crucial role in protecting and promoting public health by regulating and supervising food safety, pharmaceutical drugs, medical devices, and veterinary products, among others. For example, the FDA tests drugs for years before they can be sold in order to ensure safety and efficacy.