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

Fact 2: Metamorphic Rocks Metamorphic Rocks Metamorphic rocks are formed by pressure and heat.

Given the two facts above, answer the question "extreme heat and pressure form a type of what?" with the following options: 
- liquid
 - crater
 - oil
 - energy
 - ice
 - Injury
 - rock
 - jar


 

       rock  