How sould you reword this in your own words plz

they interacted with each other by, sending traders to sell and buy stuff for their city. the traders would buy stuff that were scarce in there home city. they would sell things that they had surpluses in at the time. the traders would go to other cites and other continents.
they where the same because they were all mostly farmers. the dravidian's and the harappa and mohenjo-daro where farmers first. the aryans where farmers last. they where different because the aryans where warriors then they turned to farming. the others where mostly farmers the whole time.