What is the process by which water dissolves certain minerals in the soil and carries them away?

A. Leaching
B. Weathering
C. Abrasion
D. Erosion

Leaching -

The present level of humus in our soils is due principally to the activity of higher forms of plant life. Upper layers of the loose parent material at the Earth's surface accumulate humus from dead plant material.

The soil pH becomes reduced and leaching takes place. Leaching is the removal of materials in solution from the soil by percolating waters.These changes form distinctive soil layers called horizons.
it is ; (A.) leaching

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