The movement of the ailerons and elevators is a response to which input?

The movement of the ailerons and elevators on the A320 is predominantly controlled by the side stick input made by the pilot or through requests from the autopilot. The side stick is a crucial flight control interface in the A320, allowing the pilot to provide commands for roll and pitch. When the pilot moves the side stick, it directly translates into control surface movements, thus adjusting the aircraft's attitude in response to the pilot's intentions.

This system is designed to enhance the handling characteristics of the aircraft, providing an intuitive and responsive means for pilots to manage the aircraft’s orientation. Autopilot requests also utilize similar control logic to operate the ailerons and elevators, as they follow the parameters set by the pilot or the flight management system to maintain desired flight levels and manage attitude.

The other options do not directly influence the ailerons and elevators in the same manner. While throttle position affects engine power and subsequently the aircraft's speed and lift, it does not directly command the control surfaces. The yaw rate sensor monitors the yaw motion of the aircraft, while flight director commands serve as guidance but still require input from the primary control surfaces that respond directly to the side stick.