Final answer:
Paper towel is the medium through which the dye mixture in a scented marker separates using chromatography.
Step-by-step explanation:
Chromatography is a technique used to separate mixtures. In this case, a mixture of inks adsorbed on a porous paper is separated by ascending through the capillaries in the paper. The components separate because some have more ability to stay adsorbed in the solid phase and less ability to solubilize in the liquid phase than the others. To separate a dye mixture in a scented marker using chromatography, the answer would be paper towel, as it is the medium through which the mixture ascends and separates.