Mold Assessment Technician Practice Exam 2025 - Free Mold Assessment Practice Questions and Study Guide

The correct choice highlights an indirect effect of mold exposure, which is structural decay. This occurs because mold thrives in damp environments, and its growth can lead to deterioration of building materials such as wood, drywall, and insulation. Over time, as these materials weaken due to mold growth, they may cause significant structural damage, which can heighten repair costs and safety concerns. This decay is a result of mold's presence but is not a direct biochemical reaction like allergic reactions that individuals may experience.

Other potential effects mentioned, such as temporary allergic reactions, would be considered direct effects of mold exposure on individuals rather than buildings. Increased energy costs can be a consequence of mold growth in terms of requiring additional heating or cooling to combat humidity or further damage, but it is also more of a secondary factor rather than a direct consequence of the physical presence of mold itself. Loss of productivity, too, might stem from mold-related issues but is best classified under health impacts that are not inherently structural-related. Therefore, structural decay clearly illustrates an indirect effect resulting from the environmental impact of mold within buildings.