Step-by-step explanation:
In a solution, a stable equilibrium is formed as particles return to the solid surface at the same rate as they leave.
Molecules leave their surface when we put salt in water, and it dissolves We might apply so much salt though that it won't absorb everything. We then have a solution which is saturated.
The dissolving operation doesn't really halt once we have reached the saturation point. What ends up happening is that molecules return to salt surface at the same rate as they leave.
The quantity of dissolving substance equals the amount of crystallizing substance that is. They call the sort of balance a dynamic equilibrium.