The change of state from solid to liquid is called melting. However, based on the options you provided, none of them directly represents melting.
- A. gas - refers to a state of matter, not a change of state.
- B. ice - is a solid state of water before it melts.
- C. no answer - might be the closest choice if the other options don't apply.
If you need a term to fill in the blank, using the option C no answer would be the most appropriate in this case.