The author uses watson to narrate the story, thereby helping the mystery better unfold for the reader. this is an example of the judicious use of

ASymbolism
BPoint Of View
CPlot Structure
DCharacter Description

Verified Answer :

Hagrid

The right answer for the question that is being asked and shown above is that: "D) Character Description." The author uses watson to narrate the story, thereby helping the mystery better unfold for the reader. this is an example of the judicious use of Character Description