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Q.

Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?

[A] Oceans, mangroves, lakes, grasslands
[B] Mangroves, grasslands, lakes, oceans
[C] Mangroves, oceans, grasslands, lakes
[D] Oceans, lakes, grasslands, mangroves
Answer & Explanation
Option: [A]

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