Which definition best matches osmosis in physiological systems?

The random Brownian motion of solute molecules that results in their accumulation where they are produced rather than their net movement toward regions of lower water concentration

The active transport of solutes across membranes using ATP to move solutes from low to high concentration against their gradients

The diffusion of water across a semipermeable membrane from an area of lower solute concentration (higher water) to an area of higher solute concentration (lower water)

The convective bulk flow of plasma proteins from the vascular compartment into the interstitial space driven by hydrostatic pressure