Final answer:
Elizabeth saves Prince Ronald by outsmarting the dragon with her intelligence, cleverly tricking it into exhaustion.
Step-by-step explanation:
In the book The Paper Bag Princess, Elizabeth saves Prince Ronald by using her wits and intelligence to outsmart the dragon. Contrary to the traditional approach of using force or magic to overcome such a formidable beast, Elizabeth employs a clever strategy to tire the dragon out. By challenging the dragon to prove its strength and power, she tricks it into exhausting itself, ultimately leading to its defeat without the need for physical confrontation.