Which factor could lead to the accumulation of debris on bunks?

The accumulation of debris on bunks can largely be attributed to weather and exposure. When a boat is stored outside, it is subjected to the elements, which can include rain, wind, and sun exposure. Over time, these conditions can cause organic matter like leaves, dirt, and algae to gather on bunks, especially if they are not cleaned regularly. Moisture from rainfall can particularly create an ideal environment for algae and mold to grow, further contributing to debris accumulation.

Frequent use could actually lead to the cleaning of bunks, as boats are often checked and maintained after being taken out, while dry storage conditions would typically minimize moisture-related issues. Proper maintenance practices are aimed at preventing the buildup of debris and ensuring that bunks remain clean and functional. Hence, weather and exposure are the primary contributors to the debris accumulation on bunks.