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
 - Mechanical weathering
 - the looseness of soil
 - fissures of hot, acidic water
 - exposure to cold
 - Plant growth is reduced
 - heat production
 - looseness of dirt or compost


 

  Mechanical weathering       