Synopsis. Born on December 27, 1822, in Dole, France, Louis Pasteur discovered that microbes were responsible for souring alcohol and came up with the process of pasteurization, where bacteria is destroyed by heating beverages and then allowing them to cool. i think
It might be personification
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!
The Indigenous Australians! Hopefully this helps!!