Question

the grinding away of rock surfaces through the mechanical action of rock or sand particles is called
carbonation
abrasion
erosion
hydrolysis

Explanation:

Abrasion is the mechanical action where rock or sand particles grind away rock surfaces. Carbonation involves chemical reactions with carbon - containing substances, erosion is a broader process of wearing away of landforms by natural agents like water, wind etc., and hydrolysis is a chemical reaction involving water.

Answer:

B. abrasion