What aspect of wood quality do wood-destroying organisms primarily affect?

Wood-destroying organisms primarily affect the structural integrity of wood. This is crucial because the primary concern with these pests, such as termites and wood borers, is their ability to compromise the strength and stability of wooden structures. These organisms break down cellulose, which is essential for the wood's structural support, leading to weakness, collapse, or failure of the material over time.

While other aspects like color, texture, odor, and appearance may be influenced by infestations or decay, the fundamental issue with wood-destroying pests lies in how they threaten the overall functionality and safety of wooden constructions. Similarly, while weight and moisture content can be indirectly impacted by the presence of pests, they are not the primary concern when assessing the health and usefulness of wood as a building material.