What is the main function of a control yoke in an aircraft?

The control yoke in an aircraft is primarily responsible for controlling the aircraft's pitch and roll, which are essential components of its attitude maneuvering. When a pilot moves the yoke forward or backward, it affects the elevator control surfaces, which in turn alters the aircraft's pitch; this effectively allows the aircraft to ascend or descend. Similarly, turning the yoke left or right engages the ailerons, which control the roll of the aircraft, allowing it to bank in either direction during turns. The precise manipulation of pitch and roll is crucial for maintaining stable flight, performing turns, and managing the overall attitude of the aircraft.

The other functions listed in the options, such as controlling speed, manipulating thrust levels, or assisting with navigation, are managed by separate systems and controls within the aircraft, such as throttle controls and navigation instruments, rather than through the control yoke itself. This makes the control yoke a vital part of an aircraft's flight control system primarily for controlling its orientation in space.