Concept:Chemical weathering breaks down rocks through chemical reactions, while frost action is a physical process.
Explanation:Chemical weathering includes carbonation, hydrolysis, and oxidation.
Carbonation involves carbonic acid reacting with minerals.
Hydrolysis is the reaction of rock minerals with water.
Oxidation is the reaction of minerals with oxygen.
Frost action is physical weathering: water enters cracks, freezes, and expands, breaking rocks apart.
Therefore, frost action is not a chemical weathering process.
Answer:A. Frost action