Assuming you meant 'Angel' falls - it's freshwater.
Fresh water occurs in rivers, lakes, and ponds, and falls as rain. It is fresh in the sense that it is not salt water (sea water).
No. Niagara Falls is too cold for crocodiles.
Fresh and salt water are very different for one key reason, fresh water doesn't contain salt and salt water obviously does. There are different flora and fauna in fresh and salt water for this reason.
on fresh salt water
Salt water is water that has salt in it and it is found in oceans. Fresh water does not have salt and is found in rivers and lakes.
there is salt in salt water and little salt in fresh water
salt water
Salt water is basically just fresh water with salt mixed in.
Salt water is basically just fresh water with salt mixed in.
There was salt water but they have replaced it with fresh water.
Salt water contain salt, fresh water is practically pure.