How were the subject matters of greek tragedy and greek comedy different?

Contrast the subject matters of Greek tragedy and Greek comedy. Greek tragedy were  plays were used in play with human emotions like fear and pity just to relieve them, and comedy plays were just  meant to relax and entertain the people.

this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.