Which of the following mold types is commonly found indoors?

The correct answer is Penicillium, as it is a mold type frequently found indoors. This mold thrives in environments with moisture and organic materials, which are commonly present in homes and buildings. It has the ability to grow on a variety of surfaces, including wood, paper, and textiles, often in areas that experience water damage or high humidity.

Penicillium is not only known for its prevalence in indoor environments but also for its historical significance in medicine, particularly in the production of penicillin, an antibiotic. However, it can also contribute to indoor air quality problems and potential health issues for sensitive individuals.

In comparison, while Cladosporium can also be found indoors, it is more commonly associated with outdoor environments and is prevalent on plants. Fusarium is typically found in soil and decaying plant material, making it less likely to be found inside buildings. Rhizopus, commonly known for affecting food, especially bread, is less commonly associated with indoor environments compared to Penicillium.