People!
Lion would be killed. Grizzly bear would be more powerful and stronger.
No, they are not considered endangered as a species. The Mexican grizzly is endangered, but this is a race, not a species. Grizzly bears are a race of brown bear.
The Grizzly Bear
The two black bears would win the fight because they together weigh as much as a grizzly bear, and have bad aggressions. The grizzly bear would injure the two black bears after the two black bears killed the grizzly bear.
The grizzly bear is endangered in part of its range. It is not in danger of being completely wiped out.The IUCN lists the Grizzly bear (Ursus arctos horribilis) as 'Least Concern'. The Mexican Grizzly (Ursus arctos nelsoni) is now extinct.
Lions, especially if they are females from the same pride. The grizzly bear can defeat and kill the ox if it avoided its horns and head, but the lions will get it after the grizzly bear gets injury by the ox's body strength. If the grizzly bear attacked the 4 lions, the grizzly bear will have a chance to win because its big claws can kill 2 lions if it was strong enough to. After the lions get killed, the grizzly bear might get injured, and the ox can kill it with ease.
Grizzly bear
A Grizzly Bear is big but, if you measure them side by side, the Polar Bear is seven inches taller than the Grizzly Bear.
Grizzly bear is not poisonous.
There aren't any wild Grizzly Bears in California. There aren't any there because they were all killed off and no one has tried to get them reintroduced like some did for the wolves of Yellowstone.
It's the grizzly bear
Grizzly bear, by far.