Cycles of freezing and thawing water cause ice wedging, and ice wedging is the most important form of mechanical weathering. Given these facts, what do cycles of freezing and thawing water cause among the following options:
- 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     