Final answer:
Duccio's "The Life of Jesus" panels are part of the Maestà altarpiece located in the Siena Cathedral, which is the correct answer to the question preposed. The correct option is a.
Step-by-step explanation:
Duccio's "The Life of Jesus" panels, which form part of the celebrated Maestà, are located in the Siena Cathedral. This magnificent piece, an altarpiece composed of many individual paintings, is considered Duccio's masterpiece.
The Maestà altarpiece was commissioned in 1308 and is a testament to the unique Sienese style that Duccio founded, characterized by decorative surfaces, sinuous lines, elongated figures, and heavy use of gold.
Duccio played a significant role in the development of Italian painting, contributing to the Gothic style through his use of linearity, rich detail, and warm colors. The correct answer to the question about the location of Duccio's panels is a) Siena Cathedral.