Which of these is the newest area in Disney's Animal Kingdom?

"Pandora - The World of Avatar" landed at Animal Kingdom in 2017, turning a chunk of Florida into a glowing alien planet with floating mountains. Disney blew a ridiculous amount of money (about $500 million) building this 12-acre wonderland, and guests still wait hours to ride "Flight of Passage" or float through the "Na'vi River Journey." Turns out people really want to visit space, even if it's just pretend.