How do these dreams increase the tension in the story?
Percy Jackson

Percy’s dreams and imaginings increase the tension in the story as an integral component of conventional story-telling.  The novel’s inconclusive ending, however, robs the sequences of the kind of resolution that one normally anticipates.  Percy’s successful destruction of the pit scorpion at the end represents a triumph of adversity, but the boy understands that it constitutes only more obstacle on the road down which he is traveling.

Explanation:

roses are red,

violets are black,

for what you said,

i hope you sit on a big fat tack.