Which of the following processes takes place when a plant cell is put in a hypotonic solution?

When a plant cell is put in a hypotonic solution, it means that the solution outside the cell has a lower concentration of solutes than inside the cell. This creates a concentration gradient, causing water to move from the solution into the cell to equalize the concentration. As a result, the cell becomes swollen and firm due to the excess water it has gained. This process is called osmosis and the condition of the cell when it becomes swollen and firm is called turgid. Therefore, the correct answer is: "Water moves into the cell and the cell becomes turgid".