When dealing with a dilute solution and one needs to make it more concentrated, one should increase the quantity of solute.
In order to make the solution more concentrated therefore, one needs to increase the ratio of the solute by increasing the amount of solute in the solution. For instance, pouring more salt into a salty water.
In conclusion, the solute needs to be increased.
Find out more on concentrated solutions at https://brainly.com/question/17206790.
