The amount of matter that cycles through a food web
A) stays constant.
B) continually increases.
C) continually decreases.
D) changes unpredictably.

The matter and energy with is a given food web or ecosystem remains constant. It just get transferred from one trophic level to other in varied amount but in totality the amount of energy and matter produced at the starting of the food chain remains same. However, the energy transferred at each trophic level is only 10% of its previous trophic level.

Hence, option A is correct

The amount of matter that cycles through a food web A) stays constant. B) continually increases. C) continually decreases. D) changes unpredictably.

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The amount of matter that cycles through a food web
A) stays constant.
B) continually increases.
C) continually decreases.
D) changes unpredictably.