Direction: Choose the appropriate answer from the options given below :

______ is the movement of the solvent molecule from the region of higher concentration to the lower concentration through the semi-permeable membrane.

Osmosis is specifically the movement of solvent (usually water) molecules across a semi-permeable membrane from an area of high solvent concentration (low solute) to low solvent concentration (high solute). Diffusion involves any molecules, not just solvents, while endocytosis and exocytosis are active transport processes involving membrane vesicles.