WORLD CIVILIZATION

Detailed explanation-1: -Gold, copper, silver, bronze metals were known to Indus Valley Civilization but not iron. The Indus valley people or Harappan people not discovered iron.

Detailed explanation-2: -Indus civilization was a Bronze age civilization hence they were unaware about of Iron. Gold, Silver, Copper, Bronze and Tin are some of the metals that were known to the Indus valley people.

Detailed explanation-3: -Copper and bronze were used to make tools, weapons, ornaments and vessels. Gold and silver were used to make ornaments and vessels.

Detailed explanation-4: -Jewellery in Indus Valley Civilisation Gold, silver, copper, ivory, ceramics, and beads were the most prevalent materials used to produce jewellery throughout this time period, and many of these artefacts have been found in this civilisation.