Question

What happens when a saturated solution at a particular temperature is heated to a higher temperature

Answer 1

It becomes unsaturated again and now we can add more solute to it.

Answer 2

Solubility of a solute increases with the increase of temperature.  So when a saturated solution is heated, it become unsaturated and u can dissolve more solute in it. But when the temperature is reduced, the solution becomes super saturated and the added solutes precipitates or form crystals.