The answer is B. The person who answered theme is incorrect. Theme is important, but it is not what grabs the reader's attention. The hook is what is used to get the reader engaged. Think of a fishing hook; it's used to reel in fish. The same goes for literature; the hook is used to reel in the reader.
Answer:
grows during the workday as workers arrive
Explanation:
got it right on the test
the lesson (06.05 page 2) states under characteristics of egde cities "A population that grows during the workday as workers arrive for their jobs