The amount of the nutrient present in the trophic level is called the living state.
The correct option is B.
The amount of nutrients is constant in the earth and it only transfers from one component to another.
There are two types of cycle and this cycle is as follows:-
The oxygen cycle is a type of gaseous cycle and the main source of oxygen is Dissolved oxygen, water, and bicarbonate.
Hence, the correct option is B that is bicarbonate, dissolved oxygen, water
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