Identify the awkward or illogical part of the following sentence.

harmony is when two or more tones fit together in a pleasing combination of sounds.

a. harmony is
b. is when
c. two or more tones fit together
d. in a pleasing combination of sounds

after is the answer 111

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.  

you wright a 3 paragraph on vincen van gogh's life using textual evidence from the biography as support for your claims.