Plants absorb 1 percent sun energy for primary production and can store only 10% of the utilized energy as net production available for the herbivores. When the plants are consumed by animal, about 10% of the energy in the food is fixed into animal flesh which is available for next trophic level (carnivores or omnivores). When a carnivore or an omnivore consumes that animal, only about 10% of energy is fixed in its flesh for the higher level. For example:- Sun releases 1000J of energy, then plants take only 10J of energy from sunlight and stores 1J available for herbivores/omnivores; thereafter, a deer would take 0.1J from the plant. A wolf eating the deer would only take 0.01J. A human eating the wolf would take 0.001J, etc. The quick way to find the energy at each level