Which of the following is a common source of moisture that can lead to mold growth?

A common source of moisture that can lead to mold growth is plumbing leaks. When a plumbing system fails—whether through worn-out pipes, loose connections, or unintentional breaks—water can escape into areas that are typically enclosed, such as walls or under flooring. This creates a moisture-rich environment that is ideal for mold spores to thrive and multiply. Mold can begin to take hold in as little as 24 to 48 hours following the introduction of sufficient moisture, making prompt detection and remediation of leaks essential to preventing mold growth.

In contrast, while air conditioning condensation can also produce moisture, it is typically managed effectively through proper drainage systems and regular maintenance. Excessive sunlight tends to dry out areas rather than contribute to mold growth, and high temperatures can actually inhibit mold development as mold typically favors cooler, damp environments. Therefore, plumbing leaks present a direct and actionable source for mold proliferation.