Why are both rivers important to the economic growth of the countries they run through?

Rivers provide cheap and efficient inland transport for trade and commerce. ... They help cities and towns to carry their wastes. Their water is extensively used in irrigation and in developing hydroelectricity.

Explanation:

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as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.