In Disney's "Moana," what precious artifact must Moana return to restore balance?

The Heart of Te Fiti

How many pennies make up a nickel in US currency? What sweet fruit do peaches resemble, but without fuzzy skin? Akutaq is a traditional ice cream made by indigenous people from which U.S. state? Whose catchphrase is the sarcastic response, "Could I BE wearing any more clothes?"? Who challenges Chandler to hold his breath underwater to prove machismo?