I'm not sure what the question is here. Elaborate, please?
Answer:
Metaphor
Explanation:
A metaphor is comparing two dissimilar things without the usage of "like" or "as".
The phrase "baby you're a firework" compares you to a firework without the use of like or as, so therefore, it's a metaphor.
it is author of a source
lemme know if I am correct
