Concept:When a cell is placed in a more concentrated solution, water moves out by osmosis.Explanation:The salt solution outside the Spirogyra cell is hypertonic to the cell sap.This means the external solution has a lower water concentration than the cell interior.Water therefore moves from the cell sap across the membrane into the surrounding solution.This outward movement of water is called exosmosis.As a result, the cytoplasm shrinks away from the cell wall and the cell becomes flaccid and shrivels.Answer:D. loses water and shrivels.