Many Indus valley seals have been found in Mesopotamia in modern-day Iraq. Some Mesopotamian seals had Indus writing on them. Indus valley measuring weights have been found in the ancient city of Dilmun, which is also beyond the Indus valley. These discoveries show that Harappan traders conducted business all across the Persian Gulf. The Harappans traded important goods such as cotton and food grain crops. What can be concluded about Harappan civilization based on the information in this passage?

The information shows that the Harappan civilization was based on
and
.