Why the identity of the water not change when it formed ice?

The identity of water does not change when it freezes into ice because both states are composed of the same molecules—H₂O. The transformation from liquid to solid involves a change in physical state, but the chemical composition remains unchanged. In ice, water molecules are arranged in a crystalline structure, but they retain their fundamental properties. Thus, ice is simply the solid form of water, maintaining its identity throughout the phase change.