Most likely an ox because its hooves will crush the boar's head.
tiger
tiger
It depends on the health and size of the two animals, and the position of where are they attacking. If the ox struck the polar bear with its head or knocked its chest, the ox would win the fight. If the polar bear swiped and clawed the ox to death, the ox would be a meal of the polar bear.
2 gorillas are very strong and powerful enough to kill an ox, so the gorillas will definitely win.
The crocodile could win, but would get badly injured by the ox and the cattlebeast's body.
The ox would win if it is healthy and strong with a gore of the horns on the chest. But is likely that it would get pretty injured.
The answer is cattle or cows
Possibly the hippo.
The panther will not win since the gorilla will give a strong blow to the panther and the large ox will knock down the panther with its head. This leaves the large ox and the gorilla together in fighting. The large ox will win if it knocked the gorilla down with its head or at least gore it to death.
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.
Depends on how big is the boar and the breeds of the dogs. 3 large hunting dogs can win against any sized boar because there are 3 hunting dogs and in fact, the dogs are large. The large dogs need to avoid the boar's powerful tusks so they do not die.
The elephant. It has thick hide to protect itself from injuries like goring. One stomp of the elephant can kill an ox.