Why does the oxygen in the atmosphere never get exhausted despite the growing population?

Once oxygen is exhausted, we can breathe other gases.

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We can live without oxygen.

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Oxygen consumed by humans are balanced by photosynthesis of plants.

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Earth's atmosphere has a large reservoir of oxygen.

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Solution

The correct option is C Oxygen consumed by humans are balanced by photosynthesis of plants.
Plants make their own food in a process called photosynthesis. In this process, oxygen is produced along with food.
Plants and animals take in oxygen and expel out carbon dioxide during respiration.
Thus, the balance of oxygen and carbon dioxide in the atmosphere is maintained by the two processes photosynthesis and respiration .

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