How is each trophic level of the biomass pyramid related to the adjacent trophic levels? a. each trophic level contains ten times as much biomass as the level below it and one-tenth as much biomass as the level above it. b. as the trophic levels progress from phytoplankton to sharks, there is a decrease in the amount of biomass but an increase in the amount of available energy. c. as the trophic levels progress from phytoplankton to sharks, there is an increase in both the number of individual organisms and the biomass. d. each trophic level contains one-tenth as much biomass