food chain consumer aquatic decomposer terrestrial herbivore producer carnivore In a food chain, a ____________ must eat other organisms to survive. They can be carnivores, omnivores, or herbivores. A __________ shows a relationship among plants and animals in an environment. It can be either aquatic or terrestrial. A _____________ in a food chain breaks down decayed plants and animals into smaller pieces that can be used again by organisms. Examples include mushrooms and worms. _____________ food chains are found in water habitats such as oceans, rivers, ponds and swamps. A consumer that eats only plants. __________ food chains are found in dry-land habitats such as deserts, forests, and grasslands. A consumer that eats only other animals. In a food chain, a ____________ can make its own food. An example is a green plant, which uses sunlight, air and water to make food. omnivore predator prey A consumer that eats both plants and other animals. An animal that hunts other animals for food. Lions are such animals. An animal that is hunted or eaten by other animals.