Which of these would best explain a piece of metamorphic rock that was formed from a 5000 kg igneous rock under extreme heat and pressure?

b.have there own function.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101