Final answer:
The rudder controls the aircraft around the vertical axis, also known as yaw control, assisting in maneuvers like coordinated turns.
Step-by-step explanation:
The correct answer is that the rudder controls the aircraft around or about the vertical axis. This kind of control is known as yaw control. The rudder is a movable control surface attached to the vertical stabilizer (fin) at the tail of the aircraft. When the pilot moves the rudder pedals, the rudder swivels left or right.
This swiveling motion changes the direction of the aerodynamic force on the tail, causing the aircraft's nose to move left or right, thus controlling the aircraft's yaw.
The use of the rudder is essential for maneuvers such as making coordinated turns and counteracting adverse yaw during asymmetric thrust situations, such as engine failure on multi-engine airplanes.
The correct answer is option yaw control. Yaw control is what controls an aircraft around or about the vertical axis. This control is achieved by the rudder located at the tail of the aircraft. The rudder is responsible for generating a lateral force called side force, which in turn creates a yawing motion.