Which type of ecological pyramid shows the amount of energy stored at each trophic level?

• A. Energy pyramid
• B. Biomass pyramid
• C. Numbers pyramid
• D. Nutrient pyramid

Answer: (A)

This question is about how energy flow is represented in ecosystems. An energy pyramid shows the amount of energy available at each trophic level, from producers at the base up to top-level consumers. It’s the best choice because energy moves through the system and is largely lost as heat and used for metabolism at each step, so only a fraction passes to the next level. That makes the pyramid widest at the base and progressively narrower toward the top, clearly illustrating how energy diminishes as you move up. The other pyramids describe different quantities: biomass focuses on the mass of organisms at each level, numbers count individuals, and nutrient pyramids aren’t the standard way to depict energy distribution in this context.