Answer :
"Folded mountains form when segments of Earth's crust are bent and doubled over, whereas fault-block mountains form when stress causes pieces of Earth's crust to be thrust upward to higher elevations" best describes the difference between folded mountains and fault-block mountains.
Piles of blocks are created when large areas are crushed and moved vertically. The raised blocks are called horsts and the lowered blocks are called graben. When two tectonic plates of the Earth's crust collide, they overlap and form mountains called folded mountains. The Himalayas and Alps are young fold mountain ranges with steep undulations and high conical peaks.
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