Are rivers constructive are destructive

Answer 1

Here's a short answer:

I assume you mean "Are rivers constructive or destructive" and it is very dependent on your perspective. Rivers, like any kind of water, will erode any earth that is in contact with it, but they also deposit nutrients and soil on its banks, or in the case of rivers like the Nile, they will periodically flood and deposit said nutrients on the flood plains, making those plains fertile. If you're building something, then yes, a river can be very destructive, but they're essential for the planet's cycle of life.