I would say understatement, i guess it could be sarcastic, but I've never learned sarcasm as figuritive language, if it was my question I would say understatement.
1) The Heading (usually contains the return address. If necessary, there will be an email, phone number, fax, something similar)
2) The Inside Address (the address of who you're sending this to)
3) The Greeting (aka the salutation. Something like: dear or hello, etc)
4) The Body (the message you're writing)
5) The Complimentary Close (a short, polite closing)
6) The Signature Line (sign name of who wrote it)
Sentence fragment? Or flashback/ reminiscence. <span />
A good example of a fable is "The Tortoise and the Hare" by Aesop.
Because the animals talk in the story, they are personified, and there is a moral in it.