Which type of music made use of unusual yet basic scales called church modes? A motet
B secular music
C estampie
D gregorian chant

The correct answer is D. Gregorian chant

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.

Well i need to see the painting to be able to u.