Answer:
Step-by-step explanation:
The answer to the question is D. Decrease the angle of descent without increasing the airspeed.
Flaps are movable surfaces on the trailing edge of the wings of an aircraft that can be extended to increase the lift coefficient of the wing, which in turn allows the aircraft to fly at a lower airspeed and a steeper angle of descent without stalling. By increasing the lift generated by the wings, flaps allow an aircraft to maintain a given angle of descent at a lower airspeed, which can be useful during approach and landing. Therefore, the main function of flaps during approach and landing is to decrease the angle of descent without increasing the airspeed.