The brown bear because it would stand up and claw the three lions to death by swiping them with its paws.
The grizzly bear may win, but it would be injured. On the other hand, the lions may win, but would get themselves injured.
Lions are powerful cats, second only to the tiger. The grizzly bear is a race of the brown bear. Lions can weigh 400 pounds or more, and a large male grizzly can weigh 800 pounds or more. Chances are, the fight would be brief, with both animals retiring after a few moments. There are records of Siberian tigers killing brown bears, however.
A lion would beat a brown bear, grizzly bear, and black bear. But for a polar bear, it would be a draw. Brown bear. Brown bears were put to fights with lions before, and the brown bear simply killed the lion.
Polar bear, they are known as the most carnivorous bear.
Black bears usually flee from the bigger, stronger brown bear.
Most likely the lions, but some of the pride would either get injured or killed.
It's pretty clearly a bear. Lions aren't brown.
In a fight between a brown bear and a human, the bear would likely win due to its size, strength, and natural weapons. It is important for humans to avoid confrontation with bears and to respect their space in the wild.
A brown bear would totally eat a chimpanzee, and in fact it could take down a lot at one time.
A tiger, as they are bigger and they can take down a brown bear, whilst a lion is smaller and can't kill a brown bear.
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.
Most likely the two lions. The sun bear will not win because the ox will kill the sun bear by hitting it with its sharp horns, and the 2 lions will claw the bear to death. 2 lions are enough to kill a fully-grown ox using their 500 pound body weights, large teeth, and thick claws to bring down the ox. If the lions avoided the ox's sharp horns and attacked on the ox's body top, the lions can win such a fight.