The correct option is Faience.
Explanation
In the study of the Harappan Civilization, archaeologists classify artifacts into two broad categories: utilitarian and luxury. This distinction is primarily based on the availability of raw materials (local vs. non-local) and the complexity of the technology required for production.Detailed Analysis:
- Faience (Correct): Faience is an artificially produced material, not a natural stone or simple clay. Its production involved making a paste from ground sand or silica mixed with a distinct colour and a gum, which was then shaped and fired. This process required advanced pyrotechnology and skill. Due to the complexity of its manufacture and its synthetic nature, faience objects (such as little pots) are considered "luxury" goods and are typically found concentrated in large settlements like Mohenjodaro and Harappa.
- Terracotta: Terracotta refers to baked clay. Since clay was widely available locally in the alluvial plains and the technology to fire it was common, terracotta objects are classified as utilitarian goods used for daily needs.
- Chert and Sandstone: These are natural stones. Chert was used for making blades and weights, while sandstone was used for grinding equipment. Although they required craftsmanship to shape, they are natural raw materials and do not involve the complex synthetic creation process associated with faience.
Key Takeaway:
Faience is classified as a luxury material in the Harappan context because it is a synthetic product requiring complex technology (mixing silica, gum, and glazing) unlike objects made from locally available clay or stone.