This is the exact answer:
Turgor pressure is the pressure exerted on the cell wall of a plant. It is caused by the movement of water into the cell. When a plant cell stores substances like ions or sugars, the amount of substances inside and outside the cell are no longer equal. There are more substances inside the cell. This causes water to rush into the cell, increasing the pressure on the cell wall. The cell swells up, helping the plant to stand upright.