Fold mountains are formed when two plates .collide diverge away slide slip
A collide
B diverge away
C slide
D slip

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Detailed Solution

The correct Answer: A) collide

Why: Fold mountains form at convergent boundaries where two plates collide. Strong compressional forces shorten and thicken the crust, causing sedimentary rock layers to fold into anticlines and synclines, with thrust faults stacking slices of crust. This long, episodic process is called orogeny.

Examples: Himalayas (continental–continental collision: India vs Eurasia), Alps; Andes (oceanic–continental convergence, with folding plus uplift).

Why the others are wrong:

B) Diverge away: Creates mid-ocean ridges and rift valleys, not fold belts.
C) Slide and D) slip: Transform boundaries mainly cause lateral motion and earthquakes; little crustal shortening, so no major fold mountain chains.

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