Which of the following functions is controlled by dedicated electric servos?

The function that is controlled by dedicated electric servos is the positioning of flight control surfaces. Electric servos serve as precise actuators that adjust the angle and position of various control surfaces such as ailerons, elevators, and rudders. These adjustments are crucial for maintaining stability and maneuverability during flight. The use of electric servos allows for quick and accurate control, enabling the aircraft to respond effectively to pilot inputs or automated systems.

In contrast, while landing gear extension and throttle control may involve actuators, they often rely on different types of systems such as hydraulic or pneumatic systems. Autopilot adjustments can use servos as well, but they typically command the electric servos that directly manipulate the flight control surfaces. Therefore, the primary function directly tied to dedicated electric servos is specifically the positioning of flight control surfaces.