You are presented with the question "What is left over when salty water is heated?" and the following answer choices: 
- Time and energy
 - nutrients
 - Sediment
 - energy
 - bacteria
 - Energy.
 - loose soil
 - The solute

Now knowing that heating salt water causes the water to evaporate while the salt remains and for example, in salt water, salt is the solute and water is the solvent, choose the best answer.


 

        The solute 