Which three statements are true about the energy flow in an ecosystem? there are 3 a.)the main source of energy for the ecosystem is the sun. b.)producers convert radiant energy to chemical energy and c.)provide for the entire ecosystem. d.)energy flows from carnivores to herbivores. e.)the maximum amount of energy is received at the highest trophic level. f.)the maximum amount of biomass is present at the lowest trophic level.