Correct Answer: fungus

Solution : The correct option is fungus.

The fungus Penicillium notatum or Penicillium chrysogenum can be used to produce penicillin, an antibiotic. Penicillin is an antibiotic that prevents pathogenic bacteria from forming cell walls, preventing the growth of harmful bacteria in the process. Eukaryotic organism, which includes microbes like yeast, and mould as well as the more well-known mushrooms, is referred to as a fungus.