What is the difference between a character feature and a character trait?

How does dr. king defend the claim he makes in paragraph 9

Which line is an example of perfect iambic pentameter? a. "i have been worth the whistle." b. "whose reverence even the head-lugg'd bear would lick," c. "a man, a prince, by him so benefited! " d. "ere they have done their mischief. where's thy drum? " e. "marry, your manhood, mew! "

Edgar allan poe focuses on creating a single effect in his works. what single effect does he create in "the fall of the house of usher"? fear pusslement mystery annoyance