Who must notify the local controller when a departing aircraft taxies to a runway other than an active one?

The correct choice involves the responsibilities of ground control in the context of air traffic management. Ground control is tasked with overseeing aircraft movements on the taxiways and non-active runways, ensuring they reach the appropriate active runway for departure safely and efficiently. When a departing aircraft taxies to a runway that is not designated as active, it is essential for ground control to notify the local controller. This communication is crucial for the local controller to manage air traffic safely, coordinating the movements of departing and arriving aircraft and maintaining situational awareness.

Local control primarily manages traffic in the vicinity of the airport and is not generally involved in monitoring taxiway movements unless alerted by ground control. Approach control focuses on incoming traffic and managing the arrival procedures, while departure control usually handles aircraft once they are airborne and in active communication with the tower. Thus, ground control's role is vital in maintaining the flow of operations and ensuring that all controllers have the necessary information to manage aircraft movements effectively.