Ice wedging is brought about by
a.

carbonic acid freezing on rocks
b.

water and oxygen reacting

c.

water freezing and thawing

d.

rocks colliding with each other

c. water freezing and thawing

Explanation:

Ice wedging is formed during the coldest days of the year, when we have winter, the water that reach the soil, starts to freeze. The water is a strange molecule, when is cold, and turns into a solid, we can observe that the volume increases, that is reason that the soil can split with an ice wedging.