In biological systems, an ACTIVE transport process is one in which an important chemical component is moved from where it is in concentration, to where it is in concentration. Meanwhile, a PASSIVE transport (or diffusion) process is one in which an important chemical component moves from where it is in concentration to where it is in concentration. A FACILITATED transport process is a form of transport, where an important chemical component moves with the aid of a channel or similar structure. One specific example of a facilitated transport structure in the cell membrane is which aids in the movement of a particular chemical component, namely

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.