Final answer:
Fungi are eukaryotic organisms that can be unicellular or multicellular. They play a role in decomposition and can be pathogens causing diseases like ringworm and athlete's foot.
Step-by-step explanation:
Fungi are eukaryotic organisms that can be unicellular or multicellular. They are part of the Fungus Kingdom and have cell walls made of chitin. Fungi play a critical role in the decomposition of dead plants and animals and can be found in various environments, such as soil, rotting food, and moist places. Some fungi are pathogens and can cause diseases in humans, including ringworm and athlete's foot.