Food webs are limited to 5-6 levels because .
A. More levels would lead to a level of complexity that could not be sustained in a natural ecosystem
B. Energy is lost with each trophic level, and at some point there isnât enough energy to sustain one more trophic level
C. Higher trophic levels require more energy for their metabolism because they are larger
D. If there are too many levels in the food web, it is possible for the animals lower on the chain to be consumed completely
E. Because there is only a possibility of 5 levels: primary producers, primary consumers, secondary consumers, tertiary consumer and higher level consumer