The answer is: call and response
In most Latin american music, the lyric that written in second line is a form of response (or commentary) that given to the lyric that is written in the first line. This call and response pattern is made in order to represent human connection or religious interaction between humans and diety.
Asthenosphere is a place where the crust of the lithosphere has fractured. I hope this helped. :)
I'm pretty sure the answer is B but I'm not 100% sure