Which of the following describes the different classification of consumers in an ecosystem?
1. Herbivores are always plants. carnivores are always animals. omnivores are always humans.
2. Herbivores eat producers. carnivores eat other consumers. omnivores eat producers and other consumers.
3. Herbivores are tertiary consumers. carnivores are primary consumers. omnivores are also primary consumers.
4. Herbivores only live in aquatic ecosystems. carnivores and omnivores only live in terrestrial ecosystems.