How can Biomass be Lost at each Trophic Level?

-When the Producers have the Food, it uses some to Respire, and for Biological Molecules to help and support the Plant. The Biological Molecules account for the Biomass -The Energy, or Biomass, is Transferred when Organisms are eaten by Others, although not Much is Transferred from 1 Trophic Level, to next -And the Biomass [Energy] that they Consume is used for Respiration, so that they can Move and Keep Warm [Live] -Biomass can also be lost through Egestion: Getting rid of Undigested Food Excretion: Getting rid of Waste Products [Sweating, Urinating...]