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Mesopotamian texts datable to the third millennium BCE refer to copper coming from a region called Magan. Interestingly enough copper found at Mesopotamian sites also contains traces of nickel. Other archaeological finds suggestive of long-distance contacts include Harappan seals, weights, dice and beads. Mesopotamian texts mention contact with regions named Dilmum. Magan and Meluhha. They mention the products from Meluhha: Carnelian, lapis lazuli, copper, gold, and varieties of wood. A Mesopotamian myth says of Meluhha: "May your bird be the haja-bird, may its call be heard in the royal palace."

What was the Harappan seal made of?

Steatite

The correct answer is Option (3) → Steatite

The Harappan seal is possibly the most distinctive artifact of the Harappan civilization. The seals were made of a stone called steatite. Seals and sealings were used to facilitate long-distance communication. When a bag of goods was sent from one place to another, its mouth was tied with rope, and on the knot was affixed some wet clay on which one or more seals were pressed, leaving an impression. If the bag reached with its sealing intact, it meant that it had not been tampered with.