What kind of harmony uses only notes from the key signature

Leon and sara are arguing over when the best time is to degrease soup. leon says that it's easiest to degrease soup when it's boiling. sara says it's easiest to degrease soup when it's cold. who is correct? a. neither leon nor sara is correct. b. leon is correct. c. both leon and sara are correct. d. sara is correct. student b   incorrect which correct answer?

The art of the monogamy period was characterized by style

Which would you practice to exercise all four of your left-hand fingers? a minor chord c major chord chromatic scale e minor pentatonic scale