What role do the oceans play in the carbon cycle?
1.They have no role
2.They are a major absorber (sink( of carbon dioxide
3.both a and b
4.neither a nor b

They are a major absorber of carbon dioxide.

Explanation:

Plants present deep under the seas and algae over the Oceans and under it absorb huge amount of CO2 from our atmosphere.

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c is the correct answer hope this !