How are snowball and napoleon different from the other pigs

What is the main theme reflected in this excerpt from "ulysses" by alfred, lord tennyson?

Which sentence from the story is an example of conflict? “here were many men, and countless dogs, and buck found them all at work.” “buck had been purposely placed between dave and sol-leks so that he might receive instruction.” “by afternoon, perrault, who was in a hurry to be on the trail with his despatches, returned with two more dogs.” “that night buck faced the great problem of sleeping.”

Refer to the call of the wild to answer the question. what does the lost cabin symbolize for the men in the book? safety warmth power wealth