What does using the rule of thirds allow you to do?

It allows you to use the position of your art to naturally make it better because things put in the rule of thirds will bring your attention to them 

the rule of thirds is usually where your eyes are drawn

The anwewr are 2 , 4 .1

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.