What type of animal eats a leopards?

Answer 1

Other leopards or animals of prey.

Answer 2

A leopard is a top predator and there's no other animal that makes a habit out of eating them.

But Leopards and Lions compete for the same prey, so a Lion may well try to kill a Leopard. And if it's gone to that effort, might have a snack on the corpse while it's still at it.

Answer 3

Vultures.

Leopards are top predators, which makes them very rarely eaten. They can be killed by other animals, but they're not usually in another predator's menu.