Which statement is a central idea in Chapter I and II of Narrative of the Life of Frederick Douglass? a. An enslaved person born to the plantation master receives more privileges than those who are not.
b. Enslavers treat enslaved people as if they are equivalent to animals
c. Plantation owners force enslaved people to sing to show that they are happy with their work.
d. Enslaved people are unable to make decisions for themselves.

i think the answer is hope it

what is your question?

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.

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.