During which section of the raga involves repeatedly striking a drone string on the sitar?
a. jor
b. jhala
c. alap
d. gat tora

The raga involves repeatedly striking a drone string on the sitar during the section known as B. jhala. 
Jhala is a term in Hindustani classical music which denotes the fast-paced conclusions of classical compositions or raga.

The answer is "he was bad enough in all conscience, but the devil himself could not temp him to turn slave-trader. satirical is a synonym for sarcastic. so when the author says that tom walker could not be tempted by the devil he does not literally mean "the devil" but he means that he is too morally upright to become a slave-trader.