Concept:Chromatography separates mixture components based on how fast they move through a stationary phase.Explanation:In chromatography, a solvent carries the mixture along a stationary medium such as paper.Different components travel at different speeds because they have different attractions to the stationary medium and different solubilities in the solvent.The term used for the movement of each component through the medium is migration.Therefore, components are separated according to their differing rates of migration.Answer:B. migration