When photographing fireworks, it is important to watch that your horizons are even. true or false?

True. Of the horizons are not even the picture will not develop properly not making it look smooth and even

Where are the options?

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.