By the principle of unity in visual language, forms need to relate to each other, to have links, nexuses, to contribute to the idea of a cohesive set. Figures can be grouped or repelled, depending on their visual characteristics. Similar forms tend to establish links, attract each other, even if they are far from each other.
Remember, in melodic minor scales, the 6th and 7th degrees are raised ONLY when ascending; however, when descending, the scale is played only with the accidentals mentioned in the scale's key signature.
