The purpose of a Tragic drama is to cause Catharsis, that is pity for the main character who is often a better person than ourselves. The purpose of a Comedy play is to mock people who are worse than us and learn from their mistakes. This was defined by Aristotle, so you can fit this definition into your possible answers.
An emerald a green as the sea, A ruby as beautiful as fire; A sapphire calm as the ocean; the flint as dark as my tire. A diamond broken and shining, staying strong through the night; an opal like the sun, shining with a glinting fright; But low and behold the flint shines even more than the suns light.