Pick your answer from: 1. flow of electrons. 2. Dehydration. 3. heat energy. 4. heating liquids. 5. a hydraulic system. 6. water vapor. 7. kinetic energy. 8. Time and energy.
Given those answer options, answer the question: Fact 1: Evaporation can be used for separating a solute from a solvent in a solution. Fact 2: Heating liquids is also made easier by allowing saturated gas to reduce evaporation. Given the two facts above, what can be used to separate a solute from a solvent in a solution?
A:
4.