the wing flap
It is just called the wing.
The flaps are simply called flaps.
Mono plane.
the main parts of an airplane is 1.the propeller without it it can't fly 2.rudder 3 right wing flap 4 left wing flap 5wing 6 landing gear 7landing wheels 8tail of the plane
a single winged plane is called a monoplane
MY ANSWER: The aileron is on the far end of the wing while the flap is on the inside of the wing. now you might think that these 2 are similar but in ways they arent. The aileron help the plane to spin bank and tilt, while on the other hand the flap increases lift or decreases drag for take off and landing. Hope this helped :)
Aileron
It sounds like you are referring to what is called flap track fairings. There are usually several of them on the underside of each wing, and taper to a point at the back. These are covers for the flap tracks- the mechanical mechanism that allows the flaps to extend and retract. Without them the flap components would be exposed and create drag.
To provide the lift necessary for flight.
Stealth bomber.
circular