What is the rhythm scheme for this poem? The sun was shining on the sea,
Shining with all his might:
He did his very best to make
The billows smooth and bright—
And this was odd, because it was
The middle of the night.

i believe it is the first choice (1.)

because the major theme is(“both the wild and civilization have rules.”)

and also as u said,( based on what buck learns within the call of the wild, "both the wild and civilization have rules".this is true of humans within society as well.

it is c through the rain, the cheetah dashed.

attitude toward the subject implied in a literary work.

serious at times, angry, impassioned, and optimistic, but most of all urgent