Answer:
C. The "skeleton that holds a piece of music together.
Explanation:
The best answer I could find is that he thought inspiration came from hard work and discipline. A quote that supports this point would be when he said: "To know what you're going to draw, you have to begin drawing." So, inspirations doesn't just happen by chance.
It is a rock opera that explores Pink, a jaded rock star whose eventual self-imposed isolation from society forms a figurative wall. ... Bassist Roger Waters conceived The Wall during Pink Floyd's 1977 In The Flesh tour, modelling the character of Pink after himself and former bandmate Syd Barrett.
Hope this helps!