The diagram below represents a chromatography experiment.
Chromatography is a word that means "color writing." It is a technique that can be used to separate the components of a mixture.
In this experiment, a marker was used to make a dot of green ink on a piece of paper. The bottom edge of the paper was placed in water, and the water traveled vertically up the paper. As a result, the spot of green ink was separated into two colors: blue and yellow.
Which of the following is the BEST explanation for the fact that the blue ink moved farther up the paper than the yellow ink in this experiment?