Expansionary I think not 100% sure
Answer: A
The past perfect progressive emphasizes the duration of a past action before another action happened. For example, “I had been smoking for 10 years before I quit.” You form the past perfect progressive by using had been followed by an –ing verb.
I just took the test, the answer was "It develops an anxious tone by inserting imagery associated with damage and injury into the passage."
Hope I could help, good luck!
Fictional device because its either fictional or character