Question

how do plants and animals maintain the balance of oxygen and carbon dioxide in nature​

Answer 1

animal release carbon dioxide in nature by respiration and the plant uses the carbon dioxide in process of photosynthesis and release oxygen

Answer 2

Hey mate here your answer

The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by the plant during photosynthesis and carbondioxide released by human , animals etc. in the atmosphere. The balance of oxygen and carbondioxide is made due to respiration and photosynthesis.

I hope it's help you ☺️