Verified answer

Lions are in fact the “king of the jungles” because of their ability to outsource day-to-day management of the jungle to leopards and other "lesser" creatures while they sunbake and generally relax in the savannah.

Perhaps: Lions are in fact the “king of the jungles” because of their loud roar, proud carriage, and in the males, magnificent mane.

If I get your meaning there:

Lion's are the king of the jungle because of their speed and power, being at the top of the food chain. Lion's are the predator's of the predator's.