The model on the left is referred to as an ecological pyramid; the model on the right, a food web. There are many similarities between the models representing how food and energy move through a specific habitat: there are differences as well. What is one important difference between the two models?
A) The base of the ecological pyramid is composed only of producers while the food web has a varied base of producers and consumers.
B) The ecological pyramid implies numbers of organisms and relative available energy, while the food web does not.
C) The ecological pyramid represents several levels of consumers, while the food web does not.
D) Only the food web implies the direction of energy movement through the trophic levels.