Here's why:
* Wolverine: While they share the name "wolverine" with the weasel family (Mustelidae), they are not actually weasels. They are a solitary, large, and ferocious predator that belongs to their own genus, *Gulo*.
* Badgers: Badgers are part of the weasel family (Mustelidae), but they are distinct from weasels. There are several badger species, and they are generally burrowing, omnivorous animals.
* Beavers: Beavers belong to the family Castoridae, a separate family entirely from the weasel family. They are semi-aquatic rodents known for their dam-building skills.
So, while wolverines and badgers are in the weasel family, beavers are not related to them.