How lion become the King of jungle

It’s about mentality
How lion become the king of jungle?
If he is not the biggest the elephant is the one of the biggest, he can’t be the fastest because that’s cheetah, he can’t be the smartest so he is not biggest ,fastest and smartest so how does a lion become the king of the jungle it’s about his mentality that’s the only difference between a loin and an elephant when a lion walks up and sees the elephant he thinks lunch but elephant thinks run its all mentality