Answer:
This is a fragment because the sentence is not a complete thought.
They both kill themselves.
Making prediction is an important reading comprehension strategy and you need to identify the literary theme in order to do so. The theme is the reason why the author has written the piece; the message the author wants to convey through the story. If you know the theme, you can make prediction about how the story will progress.
In the Happy Prince, the theme is that appearance does not always represent one's true feeling; for example The big metal statue of the Happy Prince “feels” the compassion and sacrifices himself for the oppressed.
