How do drywood termites differ from subterranean termites?

Drywood termites are distinct from subterranean termites in that they live entirely within the wood that they infest. They do not require contact with the soil, which is a primary characteristic of subterranean termites. This ability allows drywood termites to infest and thrive in structures without needing external moisture or soil contact, making them particularly challenging to detect and manage.

Unlike subterranean termites, which typically build their colonies in the soil and often enter wooden structures from below ground, drywood termites can establish colonies in the wood itself, whether it's in beams, furniture, or other wooden materials. This structural preference underscores their behavioral differences and their ecological roles in wood decay and pest management situations.

The other options highlight characteristics of the termite types that do not accurately represent their behavior or habitat preferences; hence they do not correctly distinguish the differences between drywood and subterranean termites.