the third option is the only correct assignment. Yeast (e.g., Saccharomyces cerevisiae) is identified as a unicellular fungus used in the production of bread and beer . The other statements are incorrect: Paramecium and Plasmodium are single-celled eukaryotes belonging to Kingdom Protista, while Penicillium is a member of Kingdom Fungi . Lichens are symbiotic associations between algae and fungi, not protozoans . Finally, Nostoc and Anabaena are cyanobacteria (blue-green algae), which are prokaryotes classified under Kingdom Monera, not Protista .