Which of these changes Earth's climate mainly over time spans of millions of years? human interactions ocean currents volcanic eruption plate tectonics

yes? sounds right, but you didn’t ask a question.

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