What do molds require to thrive?

Molds primarily require moisture to thrive, as it is one of the essential factors for their growth and reproduction. Mold spores are ubiquitous in the environment, but without adequate moisture, they remain dormant. When humidity levels rise or when surfaces become wet, molds can begin to colonize.

While light and food can play a role in mold growth, they are not as critical as moisture. Molds can grow in dark areas, so light is not a requirement. They can also derive nutrients from a wide range of organic materials such as wood, drywall, or even dust, meaning that while they need food, they can adapt to various conditions. Therefore, moisture stands out as the primary factor necessary for mold to proliferate, making it the most accurate answer to the question.