Discussion
What causes the formation of mushroom rocks ?
Answer: B
Mushroom rocks are formed by erosion.
In deserts the wind carries sand close to the ground. It wears away the lower part of a rock more than the upper part, so the rock ends up with a narrow base and a wide top, shaped like a mushroom.
Deposition is the laying down of material, which builds features such as sand dunes and loess rather than carving rock. Weathering breaks rock down in place but does not shape this distinctive form, which needs the wind's abrasion at ground level. An earthquake is a sudden movement of the crust and does not sculpt rocks this way.
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