There is no dramatic irony in the pit and the pendulum but there is situational irony.
Grover proves that he is a real friend to Percy. For example, during the battle between Percy and Ares, Grover supports Percy throughout the conflict.
I'm sorry I only have the answer for the first question. I hope this helped you enough though
Answer:
Ask a rhetorical question or state an interesting fact.
Explanation:
Answer:
some creepy and spooky onomatopoeias: BOOOOO GRRRRRRRR WOOOOOO AWOOOOOO etc.