Final answer:
Among the options provided, all contribute to mold growth except for low humidity, which does not support the moisture requirement necessary for mold to thrive.
Step-by-step explanation:
Mold growth is influenced by various factors within an indoor environment. Elements that contribute to mold proliferation include moisture, organic matter, and suitable temperatures. Among the options provided, the presence of external insulation finishing systems (EIFS), roof leaks, and improperly installed gutters can all lead to increased moisture and water accumulation, which are conducive to mold development. However, low humidity is the one factor that does not encourage mold growth, as mold requires moisture to thrive. High humidity levels typically lead to more mold, as moisture in the air allows mold spores to settle and grow on surfaces.