Answer:
it's the sun
Explanation:
the water cycle is driven primarily by the energy from the sun
Answer:
The circulatory system
Explanation:
The heart, veins and arteries works together to service the cells of the body
Answer:
Attached answer..........
No I think you need to do some more research
Answer:
When entering, oxygen is high and carbon dioxide is being produced, when exiting carbon dioxide is being exhaled into the air
Explanation:
