You are presented with the question "What can can break down rocks from larger wholes into smaller pieces?" and the following answer choices: 
- Earthworms
 - sea urchins
 - Freezing and thawing
 - Calcium carbonate
 - Compaction
 - mechanical
 - Sedimentation
 - Cementation

Now knowing that weathering means breaking down rocks from larger whole into smaller pieces by weather and climates with freeze and thaw promote mechanical weathering, choose the best answer.


 

   Freezing and thawing      