The best first place to try on general questions like this is google.
You will find many examples, illustrations, discussions, and videos.
If you search for those rivers, you will know where they are on today's map.
In what present-day countries can the sites of your civilizations be found?
My Civilizations are Indus River and Nile River
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I do agree that you should look at a map of some kind. But I also recommend you looking in the lessons if you are apart of Connexus
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