To recycle nutrients, an ecosystem must have, at a minimum,

To recycle nutrients, an ecosystem must have, at a minimum, 




A) producers.
B) producers and decomposers.
C) producers, primary consumers, and decomposers.
D) producers, primary consumers, secondary consumers, and decomposers.
E) producers, primary consumers, secondary consumers, top carnivores, and decomposers.



Answer: B


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