Is to convince someone by the way your character and or personality. E.g if you are a well respected person you will be more easily believed. You need top have authority and make yourself worth listening to.
Is to appeal to someones emotions. E.g to make somone angry by your choice of words.
To persuade someone by reasoning logic and its supporting evidence. E.g If someone witnessed a murder, using that witness.
Improves bad behaviour by using sarcasm and irony. It is going to the complete extreme to make fun of something in a horrible way. E.g to get rid of all poor kids by eating them.