The statement that best explains why levels of an energy pyramid do not have the same amount of energy is that each level of the pyramid has a smaller amount of available energy because some energy is always lost as heat as it moves through the food chain. This is known as the 10% rule, where only about 10% of the energy is transferred between each trophic level. Therefore, organisms at higher trophic levels have less energy available to them than those at lower trophic levels.
