Why are ecological pyramids shaped as pyramids?
a. because there is a large decrease in the amount of energy or biomass as you move from one trophic level up to the next
b. because the movement of energy through the biosphere follows a path similar in shape to a pyramid
c. because decomposers form a wide base of support at the bottom of a food web similar to the base of a pyramid
d. because food webs are usually triangular in shape