The pyramid is a graphical representation of the number of organisms, energy or biomass at each trophic level.
The pyramid of energy is always upright.
The energy transfer from one trophic level to another always decreases due to the 10% law of energy transfer.
The energy always flows in a particular direction.
Final Answer:
The ecological pyramid which is always upright is of energy transfer in successive trophic levels due to the 10%law of energy transfer.