Answer: d) saturated
Explanation: When a solvent has achieved a state where it can no longer dissolve any more solute at a given temperature, it is termed ‘saturated.’ In this state, the solution has reached its maximum concentration of solute for that temperature. Any additional solute added will not dissolve; instead, it will remain as a solid. This is a fundamental concept in chemistry and helps understand how solubility works. Other options like ‘diluted’ refer to solutions with a lower concentration of solute, while ‘unsaturated’ describes a solution that can still dissolve more solute. ‘Supersaturated’ refers to a state where the solution temporarily contains more solute than its saturation point, which is unstable. Therefore, the correct answer is ‘saturated.’