What evidence was found that makes us believe that the Indus Valley civilization held sanitation as a top priority for their cities?

Explanation:

drainage system

town planning and city life

the great bath

dockyard

roads

buildings

possible the invasion of room could have been avodiable but the people of rome were to stubboron and to wealthy the kingdoms saw them as a threat if they dialred it downa   bit ten i dont think they wouldnt failed   china was not iacvvdoaible they caused war to much and were out of hand therefor that must have happened india i dont really know it could of

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