Describe the use of the control stick or yoke in flight.

The control stick or yoke is primarily used to manipulate the aircraft's pitch and roll by controlling the ailerons and elevator. When a pilot pushes or pulls the control stick or yoke, it causes the elevators at the tail of the aircraft to move, which affects the aircraft's pitch—allowing it to climb or descend. Similarly, when the pilot turns the control stick or yoke left or right, it moves the ailerons on the wings, which causes the aircraft to roll, enabling it to turn in the desired direction.

This control input is fundamental for maneuvering the aircraft during flight, as maintaining the right pitch and roll is critical for stability and effective navigation. Understanding the role of the control stick or yoke enhances the pilot's ability to control the aircraft safely and accurately. Other options mentioned, such as controlling yaw, regulating speed, or adjusting altitude directly, do not fully encompass the primary functions of the control stick or yoke, underscoring the importance of pitch and roll in effective flight management.