What role does ambiguity play in most flash fiction stories? It makes the story uninteresting until its very last scene.
It requires readers to infer, or guess at, the story’s meaning.
It requires the writer to provide a tragic or otherwise sad ending.
It allows writers to provide a neat, clearly stated message.

the rhetorical technique most used in this excerpt is parallelism. parallelism is a technique which author used in sentence as substitute of repeated synthetical similarities. it is the effect of rhetorical technique.

explanation:

answer: a mother fears that the poor lighting poses a danger to the children who play there.

answer is b,

"the tracer looks harmless in flight, but the pilot’s bitten lips and white knuckles suggest how dangerous it can be."

it was correct.

answer: b) bubbling its way

explanation: an adjective is a word or a group of words that modifies a noun (name, thing, place,

in this case, the first option "to heartily enjoy" isn't describing or modifying any noun, the third option "hiking along merrily" is describing an action but it doesn't modify any noun, the last option "beside us" is just a preposition that indicates position, so the correct answer is the second one: "bubbling its way" because it is modifying the noun "stream".