What is the principle of a Fowler flap?

Question

Question PPL(A) - Private Pilot License - Principle of Flight

QuizVDS · Accepted Answer

A profile-like flap is extended from the trailing edge of the wing

QuizVDS · Answer

A flap from the rear bottom side of the wing is folded down

QuizVDS · Answer

At high angles of attack a part of the leading edge lifts

QuizVDS · Answer

At high angles of attack a part of the leading edge lifts

Id 57 - PPL(A) EN - What is the principle of a Fowler flap?