Answer: The correct answer is "Water atoms move more easily than ice atoms".
Step-by-step explanation:
Three states of the matter are: Solid, liquid and gas.
Water is a liquid. The particles in the liquid state are loosely packed in comparison to the solid sate. They can be compressed easily. They do not have definite shape.
In the liquid state, the particles can move easily.
Ice is a solid state. The particles in the solid state are tightly packed. They cannot move. They cannot be compressed. They have fixed shape and volume.
Therefore, the difference between water and ice is "Water atoms move more easily than ice atoms".