Water is converted into ice by freezing because when water take the coolness its ets intermoleculer force increases and intermolecular spaces decreases by which it converts into ice(freezing point of water 0 degree celcius)
Due to the latent heat of energy
Water normally freezes when it is cooled below 0 degrees Celsius, forming ice crystals. … The process of starting off a crystal is called “nucleation.” In the absence of impurities in the water and imperfections in the bottle, the water can get “stuck” in its liquid state as it cools off, even below its freezing point.