Question

A moveable do refers to

each note receiving a do marking.
the do marking being used multiple times in a scale.
the do marking being assigned to the first note of a scale, no matter which pitch it starts on.
the do marking being fixed on middle C, and all other notes are based off of it.

Answer 1

Moveable do is when the do is assigned to the first note of the scale, no matter which pitch it starts on. Do changes for each scale, which is why it’s called moveable.