Ice is less dense than water because the molecules in ice are located further apart making them float at the water's top rather than making them sink. Thus, option D is correct.
Density is the amount or the volume of the substance removed by the mass of the object placed in it. Ice (solid water) has less density than water(liquid) because of its crystalline structure.
The ice has molecules placed at a distance due to the hydrogen bond in the solidified water that makes the orientation to have molecules apart making them less dense and causing them to float.
Therefore, the density of ice is less than the water making them float.
Learn more about hydrogen bonds here:
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