Fact 1: Weathering means breaking down rocks from larger whole into smaller pieces by weather.

Fact 2: Climates with freeze and thaw promote mechanical weathering.

Given the two facts above, answer the question "What can can break down rocks from larger wholes into smaller pieces?" with the following options: 
- Earthworms
 - sea urchins
 - Freezing and thawing
 - Calcium carbonate
 - Compaction
 - mechanical
 - Sedimentation
 - Cementation


 

   Freezing and thawing      