Which of the following metals was used to make weapons and tools in Harappan cities?

Copper

The correct answer is Option 3- Copper

Copper was the main metal used to make weapons and tools in Harappan cities.

The Harappans were skilled metallurgists, and they were able to extract and smelt copper from ore. They used copper to make a variety of weapons and tools, including axes, swords, spears, and arrowheads. Copper was also used to make tools for agriculture, carpentry, and other crafts.

Gold and silver were also used to make ornaments and other luxury items, but they were not as widely used as copper for making weapons and tools. Iron was not yet known to the Harappans.

The use of copper for weapons and tools was a major technological advancement for the Harappans. It allowed them to produce stronger and more durable tools than they could make from stone or wood. The use of copper also allowed the Harappans to develop more complex weapons, such as swords and spears. This helped them to become a powerful military force and to expand their territory.