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!
I think the answer is a and b
The major difference between the two comes in the depth of the bend and how that has an effect on the placement of one’s heels.
Breathing , eating, sleeping, and exercise
