If more solute can be dissolved in a solvent, the solution is:
1) unsaturated
2) saturated
3) supersaturated

Answer is: 1) unsaturated.

For example, solubility of potassium chlorate (KClO₃) at 100 grams of water at 80°C is 37.5 g, that means that all 37.5 g is completely dissolves, this is the saturated solution.

If we add 10 grams of potassium chlorate in 100 grams of water at 80°C, there is less solute than the saturated solution, so this is unsaturated solution.