Answer:
To prepare the reader in this passage the author has described something terrible, preparing the reader for a tragic event.
Step-by-step explanation:
In this excerpt from the second chapter of Frankenstein by Mary Shelley, a young Victor is impressed about a natural event that show him how something could be destroyed within seconds by something that looked like a beautiful piece of nature, where he got his dreams busted to become true and his hunger for discovery drove him to create the monster. This chapter foresees the tragedy that is about to happen.