Which agency is responsible for regulating civil aviation in the United States?

The Federal Aviation Administration (FAA) is the agency responsible for regulating civil aviation in the United States. This includes overseeing the safety of civil aviation operations, implementing regulations for air traffic control, and ensuring compliance with safety standards for airlines and aircraft. The FAA plays a crucial role in maintaining the safety and efficiency of the national airspace system, including the licensing of pilots and certification of aircraft.

The distinction of the FAA as the governing body for aviation in the U.S. is rooted in its comprehensive regulatory framework that covers all aspects of aviation, from commercial airline operations to general aviation. The other options represent agencies with different areas of focus. For instance, the Environmental Protection Agency deals with environmental protection regulations, while the Occupational Safety and Health Administration focuses on workplace safety. Transport Canada is the equivalent agency in Canada, responsible for transportation regulations within that country, but it does not regulate civil aviation in the U.S.