Answer:
Option B
Step-by-step explanation:
The best answer to this question is option B "heat of vaporization." When you add heat to a pot of water and the water starts to boil the water starts boiling/vaporizing into a gas called water vapor. The heat transformation is also known as the heat of evaporation where it's the amount of energy required to heat a pot of water to it's boiling point where it starts evaporating.
Hope this helps.