I think about the symbolism of shape.
Answer: speed and velocity
Here is the answer.....The Led Zepplin song 'Since I've been loving you' is a primary example of how a hard rock band used a blues rift and melody. One hears the Blues influence from the very begining with is slow guitar notes and continues throughout with Robert Plant's pleading lyrics.
Ik this is already an answer but u did not seem to find this answer so here it is. It is also a verified answer so its trust worthy.
