When ice melts, its volume increases. This is because the solid state of matter (ice) has a more compact arrangement of molecules compared to the liquid state of matter (water). When heat is applied to ice, the molecules gain energy and start vibrating more vigorously. This increased energy causes the bonds between the molecules to break and allows them to move more freely, resulting in an expansion of volume.

Option 1 correctly states that the volume of ice decreases when it melts. As the molecules gain energy and move more freely, they occupy more space, causing the volume to increase. Therefore, option 1 is correct.

Alert - correct answer should be 2

Option 2 is the correct answer.