What is the hallmark of the Arts and Crafts architectural style from the early 1900s?

The hallmark of the Arts and Crafts architectural style from the early 1900s is characterized by its use of natural materials such as wood and stone, which is closely tied to the movement's philosophy of craftsmanship and simplicity. Wood shingle siding is particularly representative of this style, emphasizing a connection to nature and a preference for handcrafted construction over industrialized building methods. The focus on rustic materials showcases the Arts and Crafts movement's desire to create homes that look organic and blend harmoniously with their surroundings.

In contrast, the other options highlight different architectural principles and styles. For instance, concrete blocks and brickwork do not reflect the warmth and natural feel associated with Arts and Crafts. Glass and steel construction is more aligned with modernist movements that prioritize industrial materials and methods, while elaborate stone carvings signify more ornate styles like Gothic or Baroque, which are at odds with the Arts and Crafts emphasis on simplicity and functional beauty.