Osmosis involves the movement of water across a membrane from higher to lower concentration. Here option D is correct.
Osmosis is the movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration.
In the diagram, the water concentration is higher on side X than on side Y, because side Y has more sugar molecules that take up space and reduce the amount of free water molecules.
Therefore, water molecules will move from side X to side Y through the membrane until the water concentration is equal on both sides. Here option D is correct.