What two factors primarily contribute to mold growth?

Mold growth is fundamentally dependent on two primary factors: moisture and organic material. Moisture is essential for mold spores to germinate and flourish. Without adequate moisture, mold cannot grow, as its reproductive and growth processes require a certain level of dampness. This moisture can come from various sources, including leaks, condensation, or high humidity levels in the environment.

Organic material serves as a food source for mold. Common organic materials include wood, drywall, fabric, and other biodegradable substances. When mold spores land on such material, and the right moisture conditions exist, the spores can feed on these surfaces, allowing the mold to grow and spread.

The other options do not capture the main contributors to mold growth as effectively. Sunlight is not conducive to mold proliferation, as many mold species thrive in dark, damp areas. While temperature and air circulation can influence mold growth to some extent, they are not as directly critical as the moisture and organic material. Similarly, dust and temperature do not provide the necessary conditions for mold sustenance, and while dust can contain organic components, it does not serve as a primary factor in mold growth compared to the direct combination of moisture and organic material.