C. You need a comma when the sentence changes subjects from humans to bottlenose dolphins.
The Answer is C - struggle between realistic and supernatural elements
Question: What is the passage
Answer:
It is 3, or C.
Explanation:
I love that book, and I remember how it said that John Thornton was Buck's last tie to civilization, And once he died Buck was free to go primitive without anything holding him back. Loving him caused Buck to be unsure of himself and his primitive identity.