Jack Kerouac demonstrates the influence of American blues and jazz music in “The Railroad Earth” through his use of humor and exaggeration.
detailed descriptions.
fictional characters and locations.
unconventional sentence structure.

i suggest it is anadiplosis

a.read

that would be your awnser

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.

what were the options?