Answer:
This is because they found it more interesting to roam the streets after school in their Hopalong Cassidy cowboy hats.
“<em>He gives his harness bells a shake</em>
<em>To ask if there’s some mistake.</em>
<em>The only other sound’s the sweep</em>
<em>Of easy wind and downy flake.</em>”
I don't need you to list the options, because I know for sure that the answer is 'enjambment'. That means that the line is not completed, the meaning runs over from one line into the next one, without a full stop, or any other punctuation.
