I’m pretty sure it is to read the text
<span>The three agents of metamorphism are heat, pressure, and chemically active fluids. Heat is the most important agent of metamorphism because it provides the energy that drives the chemical reactions responsible for mineral and textural changes during metamorphism.
I hope this helped! :)
You do realize that you could have just looked this up on google... right
This answer is in fact from there, and is the answer that pops up when you do a google search on your question...</span>