Figurative language is off the hook
Hyperbole
My cat weighs a ton
Hyperbole is an extrem extraction. That would be silly if your cat actually weighs a ton .
To be dramatic in the story
Onomatopoeia
The gun went " POW "
This states a sound. This could be used to mak an image
Simile
She is as pretty as a rose
This statement uses like or as. This could be used to dicribe anything.