Answer: Osmosis
Step-by-step explanation:
Osmosis can be defined as the phenomenon in which there is a difference in the concentration of materials on the different sides of the cell.
The concentration inside the cell is different and the concentration outside is different.
The membrane in between is the semipermeable membrane which allows the movement of certain molecules.
The movement of solvent takes place from a region of their higher concentration to the area of lower concentration via semipermeable membrane.