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 is formed from extreme heat and pressure?" with the following options: 
- glass
 - marble
 - crust
 - soils
 - coal
 - sugar
 - calcite
 - arteries


 

  marble       