Here's why:
* Osmosis is the movement of water across a semi-permeable membrane from a region of high water concentration to a region of low water concentration.
* Hypotonic solutions have a lower concentration of solutes (and therefore a higher concentration of water) compared to the inside of the cell.
* This concentration difference creates a gradient that drives water to move into the cell, trying to equalize the solute concentrations on both sides of the membrane.
In contrast:
* Hypertonic solutions have a higher concentration of solutes than the cell, causing water to move out of the cell.
* Isotonic solutions have the same solute concentration as the cell, resulting in no net movement of water.
