Science stuffs lol this is about diffusion, osmosis and equilibrium

Osmosis causes water to move toward the stronger concentration

Explanation:

In this system, there is a semipermeable membrane. Since the particles of solute (the black dots) are only on the left side, this means water can move across the membrane, but the solute can't. So, the water moves to dilute the stronger concentration because of osmosis (i.e. moving from high water concentration/low solute concentration to low water concentration/high solute concentration). The water would keep moving until the concentrations on both sides of the membrane are equal.

well, i believe that the answer is 2. : 3