They're only boys

who used to frolic and play
launching rainbowed kites
on the western wind,
their blue-red-green kites
whistling, leaping,
trading easy laughter and jokes
dueling with branches, pretending to be
great heroes in history.
Which of these ideas is most closely related to a theme in these lines?
sharing dreams of a hopeful future
carefree days of a happy childhood
friendly competition between friends
relaxing in the company of a good friend
What are the boys in this story doing when they are "dueling with branches, pretending to be / great heroes in history"?
Imagining they are in military battles fought with swords
Fighting angrily with each other
Trimming trees
Getting credit for their History classes

Imagining they are in military battles fought with swords

The theme most closely related to the lines is "carefree days of a happy childhood." The boys are engaging in friendly competition between friends.