Answer:
Blood is carried away from the heart by arteries. Blood that is rich in oxygen. Blood that is low in oxygen is returned to the heart by veins. there is more pressure in arteries than in veins.
B) Oxygen may not have been able to accumulate in the atmosphere
Fish would be renewable since they can be reproduced.
We cant make gold, or oil, and gasoline comes from oil, so all are non-renewable
