The main difference between a compound sentence and a compound- complex sentence is that...
Select one:

A. A compound-complex sentence has one independent and one dependent clause,
but a compound sentence has one independent and two dependent clauses.
B. A compound sentence has one independent and one dependent clause, but a
compound-complex sentence has one independent and two dependent clauses.
C. Both have at least 2 independent clauses, but a compound sentence also has a
dependent clause.
D. Both have at least 2 independent clauses, but a compound-complex sentence also
has a dependent clause

answer; /// the correct answer to the above statement is (a) because of the decline on native american labor forces;

the answer is c because info security should not use them for code

harlem's  cotton club boasted the talents of duke ellington. singers such as bessie smith and billie holiday popularized blues and jazz vocals. jelly roll morton and louis armstrong drew huge audiences as white americans as well as african americans caught jazz fever.

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.