1.Water is a form of liquid formed by oxygen and Hydrogen. Its properties are 1. You need to be near water. 2.Most of its Techniques have good effects . And three- These are hard to master- i like challenges thats why i diddent pick RaiTon or Katon.
2.A ninja uses water to put out fire. Or the Ninja does battle using special Suiton Techniques. A ninja applys it in battle when his element is water or is near a huge source of water. 3.To hide or to Attack with special Effects.
3.Ninja need water to live. Not just to Drink but to live. Like the Mist Village for example. With out water the world will slowly but surly crumble.
There ^.^
1. Pretty good answer. Although not all water jutsu need sources. And... the harder to master part... I see what you mean but it's kind of off. It's not necessarily easy to master, but water definately does come in more forms than the normal jutsu.
2. Good, we also use it when conductivity is needed, to make hurricanes, and when a loose style of attacking is needed. Water and wind are two of the type of elements that are truly loose. Lightning is fast, but not loose. Fire is wild, but it is wild in a sense of out of control, not as in loose. And Earth is obviously not loose, it is the most stiff element.
3. Good, and the whole 80% of us is made of water.
Overall, good answers.
Now go over there and meditate near that river. Block out all other things, and only focus on water. The sound of it, how it moves, everything about water.