A fungus is an organism that belongs to the kingdom Fungi. Unlike plants, fungi cannot perform photosynthesis and obtain their food by decomposing organic matter or by being parasites.
Fungi are highly diverse and can be found in various forms, such as mushrooms, molds, and yeasts.
Some fungi are beneficial, such as those used in food production like bread and cheese, while others can be harmful, causing diseases in plants or infections in humans. Fungi play an important role in ecosystems by recycling nutrients and decomposing organic matter.