Gregorian chants developed because pope gregory 1 wanted to standardize masses, true or false

Look at this painting by leonardo da vinci. this painting demonstrates da vinci's use of which of these to enhance the emotion of a painting

Most of the written music that has been preserved from the middle ages is a. sacred. b. for flute and guitar. c. polyphonic. d. dance music.

What “knits” the above painting together? a. the figural arrangement b. the facial expressions c. the mood, created by sunlight through the trees d. the dancing figures to the left of the painting