One of the biggest influences on Ancient Greek art and culture was: a
war
b
royalty
c
humanism
d
after life

A. war , many wars happened which shaped and influenced the art and culture

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.