The shapes, both major and minor, occur in every position and key ... You wouldn’t try to play every note in a scale ...

modulating to the relative major key of E♭ major for the chorus and then modulating back to C minor. The melodic minor scale is a minor scale with both the sixth and seventh notes raised by half ...

Harmonic minors use the relative major key signature and raise the seventh note of the scale. For example, in A harmonic minor there are no sharps or flats other than the raised seventh of G#.

The minor pentatonic is good enough for players ... You should be able to see that the C major pentatonic scale uses all the notes from a C chord, plus a couple of extras. Play through the chord ...