if no sugar was removed at any time, why did the molarity of the 2L solution change compared to the 1L solution

Question

use the words solute and solvent in your answer 

Answer 1

Again, we dont know what the experiment entails. But one can suggest that tge only waybthe molarity can change without adding or removing any sugar is by evaporation. Using solute and solvent terms, if solvent evaporates the concentration of solute increases.