Little Billy lay down in his racecar-shaped bed and tried to sleep. Suddenly, the shutters of his window began to rattle and the knob of his bedroom door started twitching. Billy sat up. The door flew open and the ghost of the house's previous owner floated in, his clothing in rags, his face covered in scars, his shoulders hunched from the many chains draped over his torso. "I must have vengeance!" the ghost declared. "Well, go have vengeance somewhere else tonight," said Billy, as he sighed. "I have school tomorrow." He plopped back down, covered up, and went to sleep. Which statement best explains how the plot of the story helps develop the main character?