You are presented with the question "What can cycles of freezing and thawing water cause this type of weathering?" and the following answer choices: 
- flooding
 - rivers
 - loose soil
 - calcite
 - Sediment
 - Metling snow
 - Winter
 - mechanical

Now knowing that cycles of freezing and thawing water cause ice wedging and ice wedging is the most important form of mechanical weathering, choose the best answer.


 

        mechanical 