Explanation and Final Answer :
-
The energy trapped per unit time and area in different levels of a food chain is shown as a graphical representation in the form of Energy Pyramid.
-
Since the flow of energy is always unidirectional, the pyramid of energy is always upright.
-
The energy which is stored by the autotrophs in the form of food is available to the herbivores as food.
-
Only 10% of this energy is stored by herbivores in their biomass and the remaining 90% is used by them in metabolic activities.
-
Similarly, only 10% of the energy of the lower trophic level is available for the organisms of the next higher trophic level.
-
Thus, the pyramid of energy depends only upon the energy in each trophic level.
