Water is what keeps us all alive, without it there would be no life, therefore it is crucial. We are lucky to have it, but we usually do not appreciate it, and take it for granted. We use it to clean, to hydrate, to satisfy our thirst, when we do sports, to cook, to create energy, and much more. It is hard to imagine a life without water. The earth would not have developed like it has if there was no water, if you take a look at other planets without water, you see that no life has started on them, because life STARTED IN water billions of years ago and it's funny because life will probably END in water as well, when the ice caps melt and make the sea level rise and the world is flooded.