Which component is responsible for controlling yaw in an aircraft?

The component responsible for controlling yaw in an aircraft is the rudder. The rudder is a vertical control surface located on the tail of the aircraft, and its primary function is to manage the aircraft's yaw, which refers to the movement around the vertical axis. When the pilot deflects the rudder left or right, it creates a difference in airflow over the rudder surface, resulting in a yawing motion that turns the aircraft in the direction of the deflected rudder.

Understanding the role of the rudder is crucial for effective aircraft control, particularly during various flight maneuvers and in managing coordination with ailerons during turns. The other components listed—ailerons, elevator, and flaps—serve different functions: ailerons control roll, elevators control pitch, and flaps are used to increase lift and drag during takeoff and landing, so they do not directly affect yaw.