In a hypotonic solution, the cell has more solute than its environment, which means that the concentration of solvent (usually water) is lower outside the cell compared to the inside. As a result, solvent moves from the area of lower solute concentration (outside the cell) to the area of higher solute concentration (inside the cell). This influx of water causes the cell to swell and can potentially lead to it bursting if the difference in concentrations is significant enough.
Therefore, the correct response to what happens to the cell in a hypotonic solution is:
The cell has more solute than its environment, so solvent moves from outside the cell to inside the cell, causing the cell to swell.