The personality trait that would make Dickon feel at home at Buckingham Palace or at the bottom of a coal mine is that he is very likable.
It is mention trough the book that he has a strange ability to captivate everyone human or not since his ability also applies to animals, everywhere Dickon goes everyone just fell under his spell and find him lovable. We can see the quotation that says :
There really was a sort of Magic about Dickon, as Mary always privately believed. When Mr. Roach heard his name he smiled quite leniently.
“He’d be at home in Buckingham Palace or at the bottom of a coal mine,” he said. “And yet it’s not impudence, either. He’s just fine, is that lad.”
The “helping words” are missing so I believe this line is a Metaphor.
Answer:
But the Prince Prospero was happy and dauntless and sagacious. When his dominions were half depopulated, he
summoned to his presence a thousand hale and light-hearted friends from among the knights and dames of his court,
and with these retired to the deep seclusion of one of his castellated abbeys.
Explanation:
The story is about a city that is ravaged by the Bubonic Plague which has killed many but Prince Prospero is unbothered and throws a party after which death meets him.
The excerpt from "The Masque of the Red Death" best shows Prince Prospero's self-centered Ness is option D.
This is because he threw a party when the city was in turmoil.