Question

which factor most significantly affects frost wedging? chemical composition freeze - thaw cycles rock color wind velocity

Explanation:

Frost wedging is a physical weathering process where water freezes and expands in rock crevices. Freeze - thaw cycles determine how often this expansion and contraction occurs, which is crucial for the process. Chemical composition affects chemical weathering more, rock color has little to do with frost wedging, and wind velocity is more related to erosion by wind rather than frost wedging.

Answer:

Freeze - thaw cycles