I think you forgot to put the pictaure of the quotes
“The cough is a mere nothing. It will not kill me. I shall not die of a cough” this part of the passage is very ironic because he really won’t die of a cough but he is explaining the cough to be nothing for him to be worried about
I believe it might be personification
The correct answer is Harmonizer.
Why?
You have every person in the group (Apeers to be a music band), but you have no one to prudce it. This is why harmonizer is the correct answer.
Hope this helps!