Which of the following terms is closely associated with drywood termite feeding behavior?

The term closely associated with drywood termite feeding behavior is xylophagy. Xylophagy specifically refers to the eating of wood, which is a key characteristic of drywood termites. These termites are known for their ability to infest and feed on dry, sound wood without needing any contact with soil. They consume the cellulose in wood, leading to structural damage over time.

While "wood boring" might seem related, as it refers to the general behavior of boring into wood, it is more of a broad term that can apply to various wood-destroying organisms, not just drywood termites. Siphoning typically describes the feeding behavior of certain insects that extract fluids, and decomposition refers to the breakdown of organic matter, neither of which specifically relates to the feeding of drywood termites. Thus, xylophagy is the most accurate term connected to the feeding habits of drywood termites.