Correct Answer:

Osmosis

Solution : The correct option is Osmosis.

Osmosis is the movement of water through a semi-permeable membrane from an area of lower solute concentration (in this case, the dialysate solution) to an area of higher solute concentration (in the patient's blood) to equalize solute concentrations on both sides of the membrane. This movement of water helps remove waste products and excess fluids from the patient's bloodstream during dialysis, helping to maintain electrolyte balance and manage kidney-related issues.