Who is responsible for ensuring compliance with the FARs?

The responsibility for ensuring compliance with the Federal Aviation Regulations (FARs) primarily lies with the Pilot in Command. This is because the Pilot in Command holds the ultimate authority and responsibility for the operation of the aircraft and the safety of the flight. The pilot must ensure that the flight adheres to regulations regarding flight operations, maintenance, and any other applicable legal standards.

Flight attendants, while essential in maintaining passenger safety and service, are not primarily tasked with ensuring compliance with FARs. Their role focuses more on managing cabin safety and assisting passengers rather than overseeing compliance with aviation regulations.

Ground control and air traffic control primarily manage air traffic and ensure the safe and efficient flow of aircraft within controlled airspace. While they communicate and enforce certain procedures, the responsibility for regulatory compliance rests with the Pilot in Command. Thus, the Pilot in Command's unique role and responsibilities make them the correct choice for this question regarding compliance with FARs.