Which of the following is a primary responsibility of a tower controller?

A primary responsibility of a tower controller is coordinating ground movements and taxiing. This involves directing aircraft on the ground and ensuring that they move safely to and from runways, taxiways, and gates. Effective coordination minimizes the risk of accidents and delays, as the controller must monitor multiple aircraft and vehicles simultaneously, providing clearance for them to taxi and ensuring that they remain a safe distance from each other.

In conjunction with managing takeoffs and landings, the role of coordinating ground operations is crucial for maintaining the flow of air traffic and ensuring safety at the airport. While providing weather reports to pilots is important, it often falls under the purview of other personnel, such as meteorologists and flight service stations. Additionally, scheduling maintenance for aircraft is not typically handled by tower controllers; that responsibility is more aligned with maintenance personnel and flight operations teams. Hence, the coordination of movements and taxiing is a fundamental duty unique to the tower controller's role in air traffic management.