Which direction do the ailerons move when the control wheel is turned left?

When the control wheel is turned left, the aircraft needs to roll to the left. This is achieved through the movement of the ailerons. The ailerons are situated on the outer wings of the aircraft and work in opposition to each other. When the control wheel is turned left, the left aileron moves up, while the right aileron moves down.

This movement increases the lift on the right wing and decreases the lift on the left wing. The net effect of this differential lift causes the aircraft to roll to the left, allowing for the desired maneuver in that direction. A thorough understanding of aileron mechanics is crucial for effective aircraft control, particularly during roll maneuvers.

Thus, the correct answer illustrates this principle of how the ailerons operate in response to the control wheel input.