Moana is ready to leave the island, but Chief Tui wants to convince Moana that the village of Motunui is all she needs. The island’s resources are scarce: there are only so many people and so much land. The islanders rely on each other to produce products using the resources that are available.
A second consideration for this video is how it relates to command and control economies or economies that practice arbitrage. There may be other island economies nearby that Motunia could trade with, but they currently only consume everything they produce on their own.