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

Fact 2: Metamorphic Rocks Metamorphic rocks are the most common rocks in which garnets are found.

Given the two facts above, answer the question "how can garnets be formed" with the following options: 
- by radioactive formations
 - extreme cold and pressure
 - raw crystal formations
 - extreme heat and pressure
 - The bending of a ray of light
 - rays or beams
 - Light passing through water
 - solid, liquid, gas


 

    extreme heat and pressure     