What body oversees rule-making for aviation safety in the United States?

The Federal Aviation Administration (FAA) is the correct choice as the governing body responsible for overseeing rule-making pertaining to aviation safety in the United States. The FAA's main mission encompasses promoting safe and efficient air travel for the public by establishing regulations, enforcing compliance, and ensuring the safety of civil aviation. This includes crafting standards for airworthiness and operational safety, as well as overseeing the certification of pilots and aircraft.

While other organizations like NASA, NTSB, and DHS play important roles in aviation, they do not specifically handle rule-making for aviation safety. NASA engages in research and development related to aviation technology and safety but does not formulate regulations; the NTSB is primarily focused on investigating aviation accidents and recommending safety improvements, rather than regulating; and the DHS is concerned with national security aspects, including aviation security, but does not cover aviation safety rule-making. Therefore, the FAA is the clear authority in this area.