HARMONY LOOKS LIKE A) A SINGLE LINE OF NOTES

B) PLAYING XYLOPHONE BARS ONE AT A TIME

C) NOTES STACKED ON TOP OF EACH OTHER

my choice is B

Explanation:

because they are playing one at a time but at the same time that symbolises harmony and unity

hope I was helpful^^

answer; i believe that the correct answers are ///train hospital staff on how to use new machinery and design an artificial lung that could be implanted in humans;