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Answer:
The answer to this I'm pretty sure is B shelfs
Explanation:
its should be shelves sorry if it's wrong but I'm sure its right
Gray wolves disappeared from the Yellow Stone National Park, because when the National Park was built during the early 1800s, 1872 to be exact, Gray wolves were not protected by the park itself, there were no laws to protect these species, which is why hunters, who come across the park, hunts these gray wolves until their population decreased.
-Hope this helps