Which structural feature can effectively prevent termite access?

Concrete foundations are highly effective in preventing termite access due to their solid composition and the lack of spaces or gaps that termites can exploit. Termites are primarily attracted to wood, and a concrete foundation creates a physical barrier that significantly reduces the likelihood of termites reaching wooden structures above.

Concrete structures are also inherently resistant to the moisture that many termite species require for survival and movement. By eliminating access points and providing a dry, dense, and uninviting environment for termites, concrete foundations contribute greatly to the overall pest management strategy in buildings.

Other options, such as wooden decks or plywood sheathing, can provide potential entry points for termites, as they are composed of organic material that termites feed on. Soil barriers can help in some contexts but are often not as comprehensive or durable as a solid concrete foundation, which remains a preferred method in termite prevention strategies.