Answer:
D. a solution containing a high concentration of solute
Explanation:
Water alongside solutes tends to naturally move in the environment i.e. to and fro a cell. This movement is achieved when an osmotic gradient is formed during OSMOSIS. Osmosis is the movement of water from a region of low concentration of solute (high concentration of water) to a region of high concentration of solute (low concentration of water) through a semi-permeable membrane (usually the plasma membrane).
The difference in solution concentration between a cell and its external environment creates the OSMOTIC gradient. Water moves until an equilibrium is achieved in both the cell and environment.
