Final answer:
A Sashiko-embroidered Robe from the late 19th century is made of indigo-dyed cotton fabric and cotton embroidery floss, featuring geometric designs added for both decoration and durability.
Step-by-step explanation:
The Sashiko-embroidered Robe from the late 19th century is most accurately described by the first option: it is made of indigo-dyed cotton fabric and cotton embroidery floss. Sashiko, a form of traditional Japanese needlework, was often used for decorative and reinforcing purposes. Robes and other garments featuring Sashiko embroidery employed a simple running stitch and were typically made of cotton, a material that was both durable and readily available. The characteristic indigo blue of traditional Sashiko comes from the use of natural dyes, aligning with the practices of that time. The designs were usually geometric and represented functional beauty, adding strength to the fabric while providing warmth. This technique was very different from the use of silk fabrics or the warp-wrapped weaving techniques of the Andean textiles, which often involved materials like camelid fibers, silk, and metallic threads for ceremonial purposes.