Explanation: Diverse arts and crafts were practiced in the Later Vedic period. Tin, lead, silver, Iron, gold, bronze, and copper were known to Later Vedic people.

• There were probably good smiths and smelters as a lot of copper objects have been found at PGW Sites.
• People had obtained knowledge of glass manufacturing too.
• Shresthins indicate the guilds or organization of merchants.

Source: Tamil Nadu NCERT