You are presented with the question "The sun causes water to change partially to gas by doing what?" and the following answer choices: 
- adding heat
 - changing degrees
 - Temperature
 - scattered light
 - energy
 - refracting light
 - Energy.
 - absorbing moisture

Now knowing that the sun causes water to evaporate more quickly by adding heat and evaporation is when the sun heats the water and changes some of it to gas, choose the best answer.


 

 adding heat        