Organisms that produce their own food. These include plants and trees.
Organisms that consume producers. They are usually herbivores (though sometimes omnivores).
Organisms that consume primary consumers and sometimes producers.
Organisms that consume primary and secondary consumers.
An organism that consumes and breaks down dead organisms. They are considered to be the last level of the food chain.
Producer:
Duckweed uses photosyntehsis to produce its own food
Decomposer:
Morels break down dead matter and organisms as a source for food.
Tertiary Consumer:
Coyotes are large enough to hunt raccoons and aquatic organisms like crayfish.
Secondary Consumer:
Raccoons are known to scavenge along rivers and streams to pick off crayfish and other aquatic species they can find under rocks and debris.
Primary Consumer:
The diet of crayfish are dominantly aquatic plants although sometimes they will eat smaller crayfish!