Whats the question? im confused
Water IS capable of carving the Grand Canyon. The river in the middle of the canyon eroded the ground and, over millions of years, deepened the Canyon to the one we know today. The reason it doesn't seem to be deepening is because it takes a very, VERY long time.
Hope this helps!
C) 3900
But some islands are not in use, I think
Unit and measurement
One g is the force per unit mass due to gravity at the Earth's surface and is the standard gravity (symbol: gn), defined as 9.80665 metres per second squared, or equivalently 9.80665 newtons of force per kilogram of mass.
The capital of texas is Austin