What is the primary function of a "Control Wheel" in an aircraft?

The primary function of a control wheel in an aircraft is to directly control the ailerons and elevator, which are critical for managing the aircraft's roll and pitch axes. When the pilot turns the control wheel, it moves the ailerons, enabling the aircraft to roll left or right, allowing for banked turns. Pulling or pushing the control wheel affects the elevator, which controls the ascent or descent of the aircraft by altering the pitch attitude. This direct manipulation of the primary flight control surfaces is essential for maintaining and changing the aircraft's flight path, making the control wheel a fundamental tool for pilots in maneuvering the aircraft effectively and safely.

The other options focus on different aircraft systems that are managed through other controls. For example, throttle settings are changed using throttle levers or knobs, while landing gear positions are controlled by a specific gear lever. Cabin pressure is managed by systems that automatically regulate air pressure and is not affected by the control wheel at all.