Answer: Based on the information provided, the correct answer is C. The water level is balanced and neither will occur.
The cell model in the picture has a solution with 2% sugar and another solution with 7% sugar. It is mentioned that the cell is permeable to water only, which means that water can freely move across the cell membrane.
In a process called osmosis, water tends to move from an area of lower solute concentration to an area of higher solute concentration. This movement of water helps to equalize the concentration of solutes on both sides of the cell membrane.
In this case, the cell has a lower solute concentration (2% sugar) compared to the solution surrounding it (7% sugar). As a result, water molecules will move from the solution with lower sugar concentration (outside the cell) to the solution with higher sugar concentration (inside the cell).
This movement of water will continue until the concentration of water is equal on both sides of the cell membrane. Once this equilibrium is reached, there will be no net movement of water, and the water level will be balanced.
Therefore, neither option A (water leaving the cell causing it to shrink) nor option B (water entering the cell causing it to swell) will occur. Option C, stating that the water level is balanced and neither will occur, is the correct answer based on the information provided.