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

Fact 2: Basalts are volcanic, micro-crystalline rock.

Given the two facts above, answer the question "What is broken down from larger to smaller pieces by weather in weathering?" with the following options: 
- glass
 - basalt
 - calcite
 - soils
 - fire
 - water
 - air
 - sand


 

  basalt       