Answer:
Predict or understand current or upcoming behaviors is the answer.
Explanation:
The question asks about flamingos, but in general, studying and/or observing both living and dead creatures or species can lead to understand a specific behavior during some part of the year or it can also help to predict how the may act under specific circumstances.
A general rubric does not evaluate the supporting details in a piece of writing.
"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.
Im pretty sure is the last one
