boiling only melting only melting and freezing but not boiling melting and boiling but not freezing
I gave my students this multiple choice question: During freezing, melting, and boiling, water changes from one state to another state. Heat needs to be supplied for which of these to take place?

Only one answer is correct among these 4 choices:
- boiling only
- melting only
- melting and freezing but not boiling
- melting and boiling but not freezing

Could you tell me which one is correct?

melting and boiling but not freezing