Because it is very fast so time pass!
Rivers make waterfalls. Well water is underground
Water.
no
There is a lot of water, so there will naturally be more waterfalls.
waterfalls can generate hydro-electricity by the force of the water
near water
Waterfalls are formed when water flows over resistant rock. And yes they do.
Potamophobia - Is the fear of running water. There isn't one specifically for waterfalls.
That depends on the river. Some rivers across the planet are so polluted that their waterfalls are very smelly and the water downriver is covered with foam for many kilometers. Thus, if the fall is near the spring, the water is fresh, the further you get downriver, the bigger chances are that it is polluted.
Because water is blue.
Oxygen
No. Water is nonliving, so no.