What best describes the role of air traffic controllers?

The role of air traffic controllers is best described as managing and supervising aircraft movements to ensure safety. They are responsible for coordinating the movements of aircraft both in the air and on the ground, providing guidance and instructions to pilots to maintain safe distances between aircraft, and ensuring that air traffic operates smoothly and efficiently. This involves using radar and communication systems to monitor flights, issue clearances for takeoff and landing, and provide information regarding weather conditions and airspace restrictions. The primary focus is always on maintaining safety during operations, preventing collisions, and managing traffic flow in busy airspaces.

While handling passenger and cargo logistics can be part of an airline's operations, this is not a function of air traffic controllers. Assisting with in-flight entertainment is unrelated to an air traffic controller's duties, focusing instead on passenger comfort and entertainment once they are in the air. Operating commercial airlines refers to the responsibilities of pilots and airline management, which is distinct from the air traffic control role.