The main character is examining the deceased monkey looking for a cause of death and has found multiple blood rings on it's stomach and has narrowed the cause of death down to just two causes, Simian Fever or Ebola. Hope this helps!
An abstract noun is a noun that you can't feel, hear, taste, smell, and see. Like hope. A concrete noun is a noun that you CAN feel, hear, taste, smell, and see.
So the abstract noun in this sentence is not choir, but harmony.
hope it helps!
Answer:to embarrass the Confederate states
