Valves ensure blood flows toward your heart. Vein valves work to bring the blood that flowed down via arteries back up to your heart.
Answer:
KINETIC ENERGY: A BOX MOVING ALONG.......
ELECTRICAL....: LIGHTNING PRODUCED ....
GRAVITATIONAL..... A PIECE OF FRUIT HANGING.....
RADIANT.... RADIO WAVES TRANSMITTED....
THERMAL... SAND ON BEACH FEELS....
A) the ozone layer, it is the one that takes the uv light from the sun
Answer:
Something along the lines of burning the waste without the chemicals being released.
