Cycles of freezing and thawing water cause ice wedging.
The fact is that ice seldom freezes or thaws at a uniform rate.
Ice wedging happens at varying rates.
What is the rate of ice wedging?
Options:
(A) In the winter
(B) erosion
(C) mechanical
(D) Physical weathering
(E) Dilution
(F) friction
(G) it fluctuates
(H) kinetic