Moana fell asleep while talking to you about the latest sailing expedition. What sleeping disorder do you suspect could be in her medical chart?

ELMO SUFFERS FROM SLEEPING WALKING, ALSO KNOWN AS

Princess Nella (5) is suddendly refusing to nap. Her parents are concerned. As a nurse who knows the sleep patterns that are associated with developmental stages, are you concerned?

What factor most likely contributes to teenagers needing lots of sleep?