The process that describes the movement of molecules from areas of high concentration to low concentration is called diffusion.

Here's a breakdown:

* Diffusion: The spontaneous movement of particles from an area of high concentration to an area of low concentration. This movement is driven by the inherent kinetic energy of the molecules, causing them to spread out and occupy available space.

* High Concentration: A region where there is a large number of molecules of a specific substance.

* Low Concentration: A region where there are fewer molecules of that substance.

Example: If you drop a drop of food coloring into a glass of water, the food coloring will gradually spread out and distribute evenly throughout the water. This is because the molecules of the food coloring are moving from the area of high concentration (where the drop was placed) to areas of lower concentration (the rest of the water).