Answer:
The most appropriate answer would be B. Frost wedging.
Frost wedging is a type of physical weathering of the rocks due to repeated cycles of the freezing and thawing of the water present in the crevices of the rocks.
Water has property that it expands upon freezing. This property of water helps in this type of rock weathering.
Water accumulated in the crevices of the rocks expands upon freezing and push the cracks further apart. With repeated cycles over time, it can even lead to the breaking of rocks into pieces.
