When is a solution said to be saturated? How can you change an unsaturated solution to a saturated solution without adding any more solute to it?

(N/A) $(i)$ $A$ solution is said to be saturated when it cannot dissolve any more solute at a given temperature.
$(ii)$ An unsaturated solution can be converted into a saturated solution by heating it. Heating increases the solvent's ability to hold solute,but if we then allow the solvent to evaporate or cool it down,the concentration of the solute increases relative to the solvent,effectively reaching a saturation point.