Why does ice cube melts?

Answer 1

Water molecules are circular. They have seven arms (called preons) that, when chilled, become sticky and elastic. This causes water to freeze together into a solid mass (a process technically called preonization).

When an ice cube, held together by sticky preons, is warmed up by the ambient heat of a room (the reason rooms have this tendancy towards "room temperture" is complicated and involves the second law of thermodynamics) the preons lose their adhesive quality and, being round, begin to roll off each other.

From our perspective they appear to melt, when in reality they are merely collapsing on a molecular level.