When referring to a structure, what does thatched imply about the material used?

The term "thatched" typically refers to a roofing method that employs natural materials, primarily straw, reed, or other grass-like substances. This implies that the structure featuring thatch has a rustic design, which often emphasizes natural elements. Thatching is a traditional technique that has been used for centuries, especially in rural settings, and is associated with a warm, earthy aesthetic that harmonizes with the environment. It showcases craftsmanship and a connection to historical building practices, thus reflecting the organic and rustic charm often desired in certain architectural designs.

The other choices do not accurately convey the essential nature of thatched structures. For instance, synthetic materials are not a characteristic of thatching, nor is it exclusively used in modern buildings; thatching has a long history that predates contemporary architectural trends. Additionally, while materials can serve various functions in construction, thatching primarily functions as a roofing material, rather than merely serving as a base for other materials.