Osmosis & Diffusion :)

Osmosis:  the  net movement of water across a semipermeable membrane from a region of low solute concentration to a solution with a high solute concentration, down a solute concentration gradient. Osmosis happens when the area surrounding the cell has a higher water concentration than inside the cell. The cell gains water along with important molecules and particles for growth. It also happens when water and particles move from cell to cell.

Diffusion: is the movement of particles from an area of high concentration to an area of low concentration. Doesn't need water to occur.