Fact 1: Cycles of freezing and thawing water cause ice wedging.

Fact 2: Ice wedging is the most important form of mechanical weathering.

Given the two facts above, answer the question "What can cycles of freezing and thawing water cause this type of weathering?" with the following options: 
- flooding
 - rivers
 - loose soil
 - calcite
 - Sediment
 - Metling snow
 - Winter
 - mechanical


 

        mechanical 