Penicillium is a _____.

Fungi

The correct answer is Option (3)- Fungi

Penicillium is a Fungi.

Explanation:

• Penicillium is a genus of fungi known for its important role in the production of the antibiotic penicillin.
• Fungi are a separate kingdom in the classification of living organisms and include various organisms such as mushrooms, yeasts, molds, and Penicillium.
• Unlike viruses, which are not considered living organisms and require a host cell to replicate, Penicillium is a multicellular organism belonging to the kingdom Fungi.
• Algae are photosynthetic organisms, and bacteria are prokaryotic microorganisms. Penicillium, being a fungus, is distinct from both algae and bacteria.

In summary, Penicillium is classified as a fungus.