The essential fact of color theory is that color is a property of not an object itself.

I am almost positive the answer is light, but let me know if that is wrong

Yes I believe it is light because light is not an object itself hope i helped

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.