The Oxygen Cycle Explained

How does the oxygen cycle work?
The oxygen cycle involves the movement of oxygen between biotic and abiotic factors.
the oxygen cycle maintains the level of oxygen in our atmosphere.
Processes within the cycle are considered either a source ( oxygen production) or a sink which involves oxygen consumption

Biogeochemical Cycles - How the Earth Recycles
https://moomoomath.com/how-the....-earth-recycles-elem