Final answer:
The elevator is the control attached to the wings and tail assembly that controls the longitudinal axis of an aircraft.
Step-by-step explanation:
The control that is attached to the wings and tail assembly and controls the longitudinal axis of an aircraft is the elevator.
The elevator is located on the horizontal stabilizer or tailplane of the aircraft. By changing the angle of the elevator, the lift or downward force on the tailplane can be adjusted, which in turn affects the pitch or angle of the aircraft. When the elevator is raised, the tailplane produces more lift, causing the nose of the aircraft to pitch up. Conversely, when the elevator is lowered, the tailplane produces less lift, causing the nose to pitch down.
The elevator is responsible for controlling the pitch of an aircraft and plays a crucial role in maintaining the aircraft's stability and controlling its altitude.