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

Answer choices:
- 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        