Biogeo Chemical Cycles
(i) Nitrogen Cycle
(ii) Carbon Cycle
(iii) Oxygen Cycle
(iv) Water Cycle
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oxygen cycle is the correct option
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Answer:
Oxygen cycle
Explanation:
Oxygen cycle refers to the movement of oxygen through the atmosphere (air), Biosphere (plants and animals) and the Lithosphere (the earth's crust). The oxygen cycle demonstrates how free oxygen is made available in each of these regions, as well as how it is used.
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