Which type of ecological pyramid is always upright in all functional ecosystems regardless of energy transfer efficiencies?

💡 Solution & Explanation

The ecological pyramid of energy is always upright because energy transfer between trophic levels follows the laws of thermodynamics, resulting in progressive heat loss. Pyramids of numbers and biomass can occasionally appear inverted, such as in tree ecosystems or aquatic phytoplankton communities. Energy flow is unidirectional and loss-bound.