Air: 78% nitrogen, 21% oxygen, 1% other.
We breathe oxygen and other molecules.
Air containing a substantial fraction of oxygen. If there is not enough oxygen we die.
We breathe in oxygen and we breathe out carbon dioxide
Why do people breathe ? Plants need oxygen too .
People breathe out because we need to breathe fresh air, and if we kept the same air in our bodies it would not be fresh after a while, and we would die.
Oxygen is used to help people breathe in and out
That's right, cats breathe with their lungs, just as people do. All mammals use lungs to breathe.
PLants help people many ways. they breathe in carbon dioxide, which is what we breathe out. they breathe out oxygen, which is what we breathe in. without plants, we'd die from suffocation.
No because they still have to breathe like others do to.
No. It suffocates them