Answer: You're welcome!
Why were waterways such as the Indus, Ganges, and Huang He Rivers important in the past?
In history, water was the best thing a civilization could have. it provided transportation, food, and drinking water to the people.
How are they important now?
They're important now because they are a very important part of transport of goods from india.
Are historical or current borders the same? Are they different?
They are different, because back when it was recognized as the mauryan empire the main difference being that there was land toward the top in the past, but less toward the bottom as the tamil kings were located there.