I think it's agriculture.
Answer:
auxin
Explanation:
i am not that dumb i just over looked it
It’s because they’re curious or they get peer pressured into doing it to “fit in.”
Answer:
Lungs supply oxygen carried by blood to cells of the body. The cells which are responsible for the transportation of oxygen is hemoglobin. When oxygen rich hemoglobin reaches a cell so the oxygen is unloaded and carbondioxide which is produced as a waste product is loaded in hemoglobin. Again this hemoglobin goes to the lungs and dispose carbondioxide there and repeat the process again.