The correct answer to this question is Diffusion selectively permeable membrane. Osmosis occurs when water moves through the membrane of a cell. Another part of osmosis is water potential. This occurs when water moves in and out of the cell.
There are two types of water potentials, which are high potential and low potential. Pure water has a high water potential, while soluted water has a low potential. Osmosis is how plants take in water and the water is taken in through the plants roots. Our body also goes through osmosis and the process is intrical to keeping our kidneys clean.