Pronounce is a way to talk. Check a thesaurus to see enunciate's synonyms.
We would need more information, are you sure this is all there is?
With the information that is given I believe that the answer is:
C. Constantly changing pieces of literature.
The correct answer is A) metaphor. Metaphor is just comparison without using 'as', or 'like', so it is a shortened simile. Instead of saying 'a years is like a Ferris wheel', you can just say that without 'like', and the meaning will be the same. The whole line is a metaphor, so symbolic meaning of something else.
