how do we breathe? explain in 20lines
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When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
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Answer: we breathe with the help of oxygen . We get oxygen from the tree . We're human being are cutting the tree for making the product . One day we would not be able to take the breath because there would be no oxygen to breathe .
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