Which statement is true regarding drywoods?

The statement regarding drywoods that is true is that they specifically prefer sapwood. Drywood termites are known to inhabit wood that is more nutritionally rich, which is typically the sapwood, as it contains more moisture and living cells compared to heartwood.

Drywood termites can thrive on sapwood because it provides the necessary resources for their survival, including food and moisture. This makes the sapwood the more favorable choice for these pests, as it allows them to effectively digest cellulose, which is their primary food source.

The other options inaccurately represent the behaviors and preferences of drywood termites. While heartwood can be utilized by some wood-dwelling organisms, it lacks the moisture content and nutrients that define the conditions needed for drywood termites. This preference for sapwood is critical in understanding their behavioral ecology and in managing infestations effectively.