I’ve been checking out a lot of tabs lately and I’m wondering what defines really the choice of the mode. I know everything is related to each other and that choosing A minor would be the same thing as choosing C major or even choosing D dorian in that case, just like saying that 1 meter is equal to 100 cm. But what defines the mode chosen? I know most of modern music is either written in major or minor but is there a certain rule for that? Like taking the first chord and defining it as the “home chord” and choosing the mode accordingly or is it the melody that dictates it?