Food web
In a natural community, several food chains are interlinked to form a food web. Several herbivores may feed on one plant. Similarly a given herbivore may be eaten by different carnivores
Examples

Pyramid of numbers
When the numbers of organisms at each trophic level are considered and the results represented in a graphic form, a pyramid shape is obtained. This is because one herbivore feeds on many green plants. One carnivore also feeds on many herbivores

Carnivores (tertiary consumers)

Carnivores (secondary consumers)

Herbivores (primary consumers)

Green plants (producers)