Answer:
"Once upon a midnight dreary, while I pondered, weak and weary,"
Explanation:
This makes the tone gloomy because it informs the reader(s) that Poe is weak and weary. When someone is upset or gloomy they are tired, week, weary because they don't want to do anything. So this line would help create gloomy tone of the poem.
No, because as you said it "does NOT contain fact-based details" therefore it is not reliable. If something doesn't contain fact-based details, it isn't reliable.
Answer:
But my father may be dead by then and it’s wicked but we’re selfish to think
of our happiness only.
Explanation: