An ecological pyramid shows the relationship of biomass, productivity or energy at different trophic levels. The primary producers are generally shown at the bottom and apex predators at the top. The pyramids are different for different ecosystems. The pyramid of numbers shows the number of individual organisms at successive trophic levels. In a forest ecosystem, the producers are large size trees that make the base of the Pyramid. The herbivores such as fruit-eating birds, deer, elephants, etc. make the primary consumers and are less than primary producers. After that, the number goes down at each successive level. Thus, a Pyramid of numbers in a Forest Ecosystem is partially upright or spindle-shaped. C is Spindle Shaped.