Fact 1: Extreme heat and pressure change rock into metamorphic rock.

Fact 2: Marble is a form of metamorphic rock.

Given the two facts above, answer the question "what does extreme heat and pressure change rock into?" with the following options: 
- coal
 - crust
 - forces
 - calcite
 - an object
 - marble
 - soils
 - mines


 

      marble   