So this is known as osmosis. So osmosis is the process by which water naturally flows from a high osmotic potential or low solid concentration to a low osmotic potential or a high solid concentration. And this is described by the following diagram. So, water tends to move from a high osmotic potential, the left side, which is also the low solub concentration, and it moves to the low osmotic potential or the high solub concentration, the right side. So it always naturally moves from this side to this side. And this is known as osmosis.