Answer: saturated
Step-by-step explanation:
Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.
Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.
Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.
As no more solid KCl dissolves and some solid KCl is still visible in the flask, the solution is termed as saturated