Question

Hi,
What is Oxygen cycle???​

Answer 1

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The oxygen cycle is the cycle that helps move oxygen through the three main regions of the Earth, the Atmosphere, the Biosphere, and the Lithosphere. The Biosphere is the sum of all the Earth's ecosystems. This also has some free oxygen produced from photosynthesis and other life processes.

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Answer 2

Explanation:

the respiration by animal

and by trees is called oxygen cycle.

e.g.

man releases carbon dioxide and trees inhale it and releases oxygen is called oxygen cycle.

Thanks

I hope its helpfull to you.