Evaporation can be used for separating a solute from a solvent in a solution, and evaporation occurs when a liquid dries. Given these facts, what can be used to separate a solute from a solvent among the following options:
- liquid drying
 - activation energy
 - a hydraulic system
 - chemical equations
 - Condensation
 - circulatory systems
 - heat energy
 - water vapor


 

 liquid drying        