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

Fact 2: Unconsolidated rock is rock such as gravel.

Given the two facts above, answer the question "in weathering, what is broken down from larger to smaller pieces?" with the following options: 
- sand
 - h2o
 - crust
 - gravel
 - crackers
 - clouds
 - calcite
 - soils


 

    gravel     