Answer:
2. providing feedback such as "Um-hum" or "interesting" indicates that you are listening
Explanation:
A round character in a novel, play, or story is a complex personality. Like real people, they have depth in feelings and passions. For instance, in the movie “Shrek,” the main character says “‘Ogres are like onions,” which means that, what appears to them is not the only truth. Rather, there is something more inside them.
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!
