Cycles of freezing and thawing water cause ice wedging, and the fact is that ice seldom freezes or thaws at a uniform rate. Given these facts, what is the rate of ice wedging among the following options:
- In the winter
 - erosion
 - mechanical
 - Physical weathering
 - Dilution
 - friction
 - it fluctuates
 - kinetic


 

       it fluctuates  