ice forming on a lake dew forming on grass snow melting into a puddle water evaporating from a pond
I gave my students this multiple choice question: Which of the following describes water changing from liquid to solid?

Only one answer is correct among these 4 choices:
- ice forming on a lake
- dew forming on grass
- snow melting into a puddle
- water evaporating from a pond

Could you tell me which one is correct?

ice forming on a lake