Answer:
"Osmotic imbalances are substances that are present in different concentrations on each side of a membrane, and the membrane is impermeable to that substance."
Further explanation;
Osmotic imbalances occur when there is a difference in the concentration of solutes (such as salt, sugar, or ions) on either side of a selectively permeable membrane. This causes the solvent (usually water) to move from the side of low concentration to the side of high concentration, leading to a change in volume or pressure of the solution. The membrane is impermeable to certain substances, such as large molecules or ions, and this creates a concentration gradient that drives osmosis.