To Best Use Earth's Net Primary Productivity to Feed the Most

To best use Earth's net primary productivity to feed the most people,diets should be modified to include only ________,moving ________ the food chain and gathering the maximum amount of energy available from a given biomass of producers.

A) meat; higher up
B) meat; lower down
C) plant material; lower down
D) plant material; higher up

Correct Answer:

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