Please tell..........

Since only 10% of energy is transferred to the next level, the number of organisms greatly decrease as we go up each trophic level. The size of the organism may be bigger, but their number is less to a much greater extent than the herbivores. The term commonly used to measure the mass of all living organisms in a particular trophic level is biomass.

The biomass of herbivores is always so much larger than that of carnivores. Also, there are more plants than everything else combined--the plant populations support all other populations in the ecosystem, either directly or indirectly.