Question

where does erosion occur? above and below ground below ground on top of mountains only above ground

Explanation:

Erosion is the process of wearing away of rocks, soil, etc. by natural forces. Above - ground erosion includes processes like wind erosion (e.g., sand dunes formation), water erosion (e.g., river - bed widening), and glacial erosion (on mountains). Below - ground erosion can occur due to processes like the action of groundwater dissolving soluble rocks (karst formation) or the movement of soil particles by underground water flow. So erosion occurs both above and below ground.

Answer:

A. Above and below ground