Which of the following organisms is a decomposer? Fox. Mulberry tree mushroom Bluebird.

Mushroom.<br /><br />Decomposers break down dead plants and animals. Mushrooms are fungi, and fungi are a primary type of decomposer in most ecosystems. Foxes and bluebirds are consumers (predators), and mulberry trees are producers (plants that make their own food through photosynthesis).<br />