If you know the minor scale, the root of the relative major is always the third note of the minor scale. For example, “F” is the third note of the D minor scale (D, E, F, G, A, Bb, C). F major is the relative major of D minor. It works the same for all minor scales.
In a circular narrative, the story ends where it began. Although the starting and ending points are the same, the character(s) undergo a transformation, affected by the story's events
