Question

Why all the oxygen is not getting used up even though a large number of organisms are consuming
it? How is the oxygen getting replaced back in the atmosphere? Explain.​

Answer 1

Answer:

All the animals(including humans) inhale oxygen and exhale carbon dioxide but plants take in carbon dioxide during photosynthesis and give out oxygen. Thus we can say that oxygen is getting replaced back in the atmosphere by the process of photosynthesis which is performed by plants.

Answer 2

Heya....

Answer:

All the oxygen is not getting used up even thought a large number of organism are consuming but the oxygen getting replaced back in the atmosphere because in the atmosphere there are also some living organisms which use carbon dioxide and release oxygen and this organisms is plant plants use carbon dioxide and release oxygen by the process of photosynthesis.

In our atmosphere it was made in such a systematic way that all the things were used in a ratio why all the animals living in this planet.

Hope its help.....✌✌✌