You are presented with the question "Freezing and thawing cause what type of weathering?" and the following answer choices: 
- loose soil
 - climate
 - mechanical
 - flooding
 - Sediment
 - rivers
 - Metling snow
 - Winter

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      