Enumeration is a SD by which separate things, properties or actions are brought together and form a chain of grammatically and semantically homogeneous parts of the utterance. Sometimes absolutely heterogeneous notions are made homogeneous from the semantic point of view.
e. g. She wasn't sure of anything and more, of him, herself, their friends, her work, her future.
Asyndeton is a deliberate avoidance of conjunctions in constructions in which they would normally used. e.g. He couldn't go abroad alone, the sea upset his liver, he hated hotels.
Polysyndeton - is a deliberate usage (overuse) of connectives between the parts of the sentence. It’s mostly identical repetition of conjunctions: used to emphasize simultaneousness of described actions, to disclose the authors subjective attitude towards the characters, to create the rhythmical effect.
e. g. The heaviest rain, and snow, and hail, and sleet, could boast of the advantage over him in only one respect. The difference between the Enumeration and P: the first shows things united, the second – isolated.
Ellipsis, break in the narrative, represented speech.
Ellipsis - is a deliberate omission of some parts of the sentence for the purpose of shorter and more emphatic presentation of an emotionally coloured speech. It is the omission of a word necessary for the complete syntactical construction of a sentence, but not necessary for understanding The stylistic function of ellipsis is to speed up the tempo, to imitate the colloquial language, to connect its structure.
e. g. You feel all right? Anything wrong or what? Oh, finally! Go! Stop it! Nor more!
Question in the narrative. Changes the real nature of a question and turns it into a stylistic device. A question in the narrative is asked and answered by one and the same person, usually the author. It becomes akin to a parenthetical statement with strong emotional implications. e. g. For what is left the poet here? For Greeks a blush - for Greece a tear. (Byron “Don Juan”)
Unlike rhetorical questions it does not contain statements. Question in the narrative is very often used in oratory. This is explained by one of the leading features of oratorical style - to induce the desired reaction to the content of the speech.
But I noticed that many linguists don't have such stylistic device as question in the narrative in their manuals, at all. To say the truth, difference is not clear.