Which ATC facility is primarily responsible for conducting pilot briefings?

The Flight Service Station (FSS) is primarily responsible for conducting pilot briefings. This facility plays a crucial role in providing pilots with essential information before flights, such as weather conditions, NOTAMs (Notices to Airmen), and other relevant data that influence flight planning and safety. The briefings provided by FSS are tailored to the needs of pilots, offering guidance on the safe operation of flights, especially regarding aeronautical information that may affect their routes or safety.

In contrast, the other options serve different functions within air traffic control. Ground Control is mainly responsible for managing aircraft movements on the ground, excluding active runways, while Approach Control deals with the arrival and descent of aircraft as they approach an airport but does not engage in the direct provision of pilot briefings. Clearance Delivery is tasked with issuing initial clearances to pilots for their planned routes and allows pilots to understand the specific instructions for their flight, but it does not provide the comprehensive pre-flight information that FSS offers.