It is a Adjective Phrase :)
Answer: dramatic irony
explanation-
First is A) Imagery sets moods for stories
Second I assume is D) Fast and slow because it's an "exciting" text, but the dashes cause for a pause, almost like a comma or if to say "take a breath".
Answer:
b. The man from Maw and Meggins looked furtively at Mrs. White without speaking.
Explanation:
The word "furtively" means doing something in a hidden way, in a disguised, almost imperceptible way. Among the options shown in the question above, the only one that used that word correctly was option "B", as it showed how The man from Maw and Meggins looked discreetly and in disguise at Mrs. White, without issuing any comment, without drawing any attention .