Why might mold growth be more common in basements?

Mold growth is more prevalent in basements primarily due to higher humidity and moisture levels. Basements are typically below ground level, which makes them more susceptible to groundwater infiltration and dampness. The underground environment can trap moisture, leading to increased humidity, especially in areas where water drainage is poor or there are leaks from plumbing or foundation walls.

When humidity levels rise above 60%, it creates ideal conditions for mold spores, which are always present in the air, to germinate and thrive. Additionally, basements may not receive adequate airflow, making it difficult for moisture to evaporate. This combination of high humidity and potential moisture sources makes basements a prime location for mold growth, emphasizing the importance of monitoring and managing moisture levels in such environments.

In contrast, the other options do not accurately address the primary factors contributing to mold growth. While basements may be cooler and less ventilated, and may receive little natural light, these factors are secondary compared to the critical influence of humidity and moisture.