I’m page 14 of the call the wild, what is meant by the phrase the domesticated generations fell from him a book has lost a lot of hair in his fight with friends b. but is losing his civilized characteristics c. bug long to return home to the judge family d. but is learning to love a human being

"The domesticated generations fell from him" means that Buck is losing his civilized characteristics (B).

In this passage, Buck is feeling more and more estranged from where he and his ancestors ("generations") originally come from: as he gets a taste of wild life, he feels less and less like a pet ("domesticated") and more like a feral dog or a wolf. He is forgetting his stay-at-home ways ("fell from him") and sees new instincts grow in him, such as the drive to fight and hunt in a pack.

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.