Question

a raisin placed in a cup of water swells after a few hours. * which process is responsible for this change? endocytosis of water by the raisin cells diffusion of sugar into the raisin osmosis of water into the raisin active transport of water molecules

Explanation:

Osmosis is the movement of water molecules from an area of high water - potential (the cup of water) to an area of low water - potential (inside the raisin) across a semi - permeable membrane (the raisin's cell membranes). Endocytosis is a process for taking in large particles, not water movement in this context. Diffusion of sugar into the raisin is not the main cause of swelling. Active transport of water molecules is not how water enters the raisin in this case as it does not require energy input for water to move via osmosis here.

Answer:

Osmosis of water into the raisin