You are presented with the question "What can cause melting?" and the following answer choices: 
- Changing pressure
 - Heat energy
 - Water expanding
 - Evaporation
 - converting electricity to heat
 - Increase in mass
 - Temperature changing
 - Chemical reaction

Now knowing that temperature changing can cause phase changes and melting is the change of phase from a solid to a liquid, choose the best answer.


 

       Temperature changing  