This document discusses the different types of food chains that exist in nature. It explains that a food chain shows the order in which animals eat plants or other animals. Herbivores only eat plants, carnivores eat meat including animals that eat plants, and omnivores eat both plants and animals. Many food chains begin with insects eating plants, which are then eaten by fish, frogs, and birds, and the chain continues with birds and animals eating the fish. One example food chain shown is plants, insects, fish, frog, bear, and people.