Q.

What is the oxygen cycle?


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a

Circulation of oxygen in different forms

b

Formation of oxygen

c

Decomposition of oxygen

d

Mixture of oxygen and hydrogen 

answer is A.

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Detailed Solution

The oxygen cycle is the circulation of oxygen in different forms.
Natural pathways that can circulate the essential elements in nature are known as the biogeochemical cycles. Oxygen is a very vital gas for the survival of all living organisms. The cycle through which oxygen is generated by photosynthesis and consumed during respiration is called oxygen cycles. Oxygen is used by plants and animals for respiration and is returned to the air and water as carbon dioxide. The circulation of oxygen in different forms through nature is known as the oxygen cycle.
 
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