Here's a breakdown:

* Osmosis is the movement of water molecules across a semipermeable membrane from a region of high water concentration (low solute concentration) to a region of low water concentration (high solute concentration).

It's driven by the difference in water potential, which is a measure of the free energy of water in a system. Water always moves from an area of higher water potential to an area of lower water potential.

Let me know if you'd like more details about osmosis!