What is the genus name for stone pine

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )

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