Which of the following describes control surfaces?

Control surfaces are the movable parts of an aircraft that actively manage its attitude and direction during flight. These surfaces include the ailerons, elevators, and rudder, which allow pilots to control roll, pitch, and yaw, respectively. By altering the position of these surfaces, pilots can execute turns, climbs, descents, and other maneuvers, thereby directly influencing the aircraft’s orientation and response to airflow.

In contrast to fixed components, which may enhance stability, control surfaces are dynamic and crucial for maneuverability. Interior instruments serve a different purpose, primarily aiding pilots in navigation and situational awareness rather than altering the aircraft's flight path. Engine performance systems focus on the propulsion aspect of flight, which is separate from the aircraft's steering and maneuvering controls. This distinction highlights the role of movable parts in piloting, emphasizing why B is the accurate description of control surfaces.