How does osmosis affect raisins?

Osmosis affects raisins by causing them to lose water when placed in a hypertonic solution, such as saltwater. As water moves out of the raisins to balance the concentration of solutes outside, they shrivel and become wrinkled. Conversely, if raisins are placed in a hypotonic solution, like plain water, they can absorb water through osmosis, causing them to swell and regain some of their original size and texture.