What body system is involved with removing this waste?

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

c. heat from the poles back down towards the equator.

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