Sand can be trucked in from other sources and filtered for sediments to eventually make way into the air and water. They can also build seawalls, revetments, and jetties along the shoreline. :)
Speed in a given direction is called velocity.
Answer:
Why do historians believe that cities in the Indus River valley had organized governments? Historians learned this through reading ancient texts. Historians believe this because the cities were built on a river.Explanation:
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