What is the acronym for the government agency that regulates safety?

The acronym OSHA stands for the Occupational Safety and Health Administration. This agency is responsible for ensuring safe and healthy working conditions for employees by enforcing standards and providing training, outreach, education, and assistance. OSHA's regulations address potential hazards that workers might encounter in various industries, making it vital for workplace safety.

The other organizations listed have different functions: the Environmental Protection Agency (EPA) focuses on environmental protection and regulations; the Nuclear Regulatory Commission (NRC) oversees nuclear energy and safety; and the Food and Drug Administration (FDA) is responsible for regulating food safety, pharmaceuticals, and medical devices. Each of these agencies plays an important role in public safety, but OSHA specifically targets workplace safety, which is why it is the correct answer in this context.