As you might be able to see, this is the fox's food web. The sun is a producer, meaning it makes something that other things can use. The sun gives energy to plants such as the berries, which is also a producer. A worm is a decomposer, which means that it eats everything. The shrew eats worms, though I don't know what I could label it as. The fox is a secondary consumer, meaning it eats both meat and plants, such as the berries and the shrew. The Great Horned Owl is the tertiary consumer. It is so because it is the top predator of the food web.