If cycles of freezing and thawing water causes mechanical weathering, then what do cycles of freezing and thawing water cause?

Answer choices:
- Metling snow
 - water vapor
 - the looseness of soil
 - mechanical weathering
 - freezing oxygen
 - fissures of hot, acidic water
 - looseness of dirt or compost
 - explosions

 

    mechanical weathering      