Extreme heat and pressure change rock into metamorphic rock, and gneiss Rocks Gneiss Rocks Gneiss rocks are metamorphic. Given these facts, what changes rock into gneiss among the following options:
- weak heat and low pressure
 - The bending of a ray of light
 - extreme cold and pressure
 - heat is produced
 - movement of tectonic plates
 - tectonic plates being pushed together
 - extreme heat and pressure
 - extreme heat and no pressure


 

       extreme heat and pressure  