Health , water is very important in the Sense that we all use it cook cook our food, it also help us in digestion.

Yeah thats true . Besides digestion, water is also essential for maintaining the integrity of human cells and carry out other processes like excretion and transport of various nutrients. It also forms a core component of various chemical substances like enzymes and hormones within our body etc.

imagine you happen to find you self in the desert for a very long period of time without having a test of water then that is went you are going

You have drawn a perfect analogy to understand the significance of a drop of water.

Good luck .