You are presented with the question "To make a liquid boil more easily when heat is applied, one should" and the following answer choices: 
- degrees Celsius
 - Evaporation of water
 - absorb light energy
 - heat is produced
 - aqueous solution
 - lower the surrounding pressure
 - evaporative cooling
 - depress neuronal excitability

Now knowing that boiling is when liquids are heated above their boiling point and if the pressure is reduced, the boiling point is lowered, choose the best answer.


 

      lower the surrounding pressure   