Concept:During a phase change, temperature remains constant. Heat energy is used to break molecular bonds, not to raise kinetic energy.Explanation:Ice at 0°C absorbs heat to become water. This heat is called latent heat of fusion. It is used to separate ice molecules into liquid. The ice-water mixture stays at 0°C until all ice melts. Only after complete melting does the water temperature rise. Therefore, during melting the temperature does not change.Answer:C. remains same