How do archaeologists known that the Harappan civilization traded?

The Harappan people used to trade with foreign lands traveling through seas. The seaports found in Harappan civilization state that they were not bound to their own territories. ... It was found that they also imported Jade from China and Cedarwood which were all traded through the rivers such as Sutlej, Ravi, and Indus.

Hope I helped?

its okay going to malibu

explanation:

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.