Answer:It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations
So i believe the answer to this is A.
Explanation:
A magnet b/c it is attracted to steel and nothing else plus it's heavy
Answer:
I'm not sure what the question is,please restate.
Explanation:
The right side of the heart sends blood out to the lungs to become oxygenated and that oxygen-rich blood comes back to the heart on the left side. Then the left side of the heart pumps the oxygenated blood to the rest of the body.
