When rocks are put under stress, they may fold, causing to form. a) faults b) anticlines and synclines c) island arcs d) mid-ocean ridges

Plate tectonics can cause continental crustal blocks to collide. When this occurs the rocks between the two continental blocks become folded and faulted under compressional stresses and are pushed upward to form fold-thrust mountains.

Explanation:

You can remember the difference by noting that anticlines form an “A” shape, and synclines form the bottom of an “S.” After erosion has occurred, geologists can use the patterns of rocks on the surface to determine where anticlines and synclines exist. ... In synclines, the youngest rocks are in the center of the fold.