You are presented with the question "What can be done to a solid by adding heat energy?" and the following answer choices: 
- massive damage
 - phasing the bubbles
 - It expands
 - cooling the center
 - Evaporation
 - changing the phase
 - removing the air
 - Water expanding

Now knowing that melting means changing from a solid into a liquid by adding heat energy and when a substance melts, it changes phase from a solid to a liquid by the application of heat, choose the best answer.


 

      changing the phase   