a. primary consumer b. detritivore c. tertiary consumer d. producer e. secondary consumer. Secondary consumers include lions and cheetahs, which prey upon primary consumers. Consumers can be carnivores (animals that eat other animals) or omnivores (animals that eat both plants and animals). Tertiary consumers, sometimes also known as apex predators , are usually at the top of food chains, capable of feeding on secondary consumers and primary consumers. Secondary consumers are organisms, primarily animals, which eat primary consumers. a. detritivore They eat only other animals. River otters are a type of secondary consumer that lives in the taiga biome. The main difference between primary secondary and tertiary consumers is that primary consumers are the herbivores that feed on plants, and secondary consumers can be either carnivores, which prey on other animals, or omnivores, which feed on both animals and plants, whereas tertiary consumers are the apex predators that feed on both secondary and primary consumers. Similarly, the Arctic fox and brown bear–the secondary consumers–feed on small mammals, like hares and lemmings, to derive the energy they require. If it eats an animal that itself is a consumer it is a secondary consumer as the second consumer in the food chain. This breakdown creates soil. e. secondary consumers. However, not all secondary consumers ...