Producers can make their own food by photosynthesis.
Consumers eat other animals, plants, or protists. Decomposers are organisms which cause the decay of dead animals, plants, and protis Feeding Levels and Energy A feeding level is the location of an organism along a food chain and food web. At each feeding level organisms use the energy they obtain to digest their food, reproduce, move, grow, and carry out other life activities. See the animated movie on Food Chain.