In this model, an energy pyramid lists these values from bottom to top: 8000 kcal, 800 kcal, 80 kcal, 8 kcal. Which value belongs to the tertiary consumers?

الشرح

Counting upward from the producers at 8000 kcal, the primary consumers hold 800 kcal, the secondary consumers hold 80 kcal, and the tertiary consumers hold 8 kcal. The 80 kcal value fails because it belongs to the secondary consumers, one level lower.