What is the purpose of a topic sentence in a paragraph?

Based on the author’s description of long island, the reader can infer that this novel willrelate events about unconventional individuals.relate events that occur directly within the city of new york.relate events that are supernatural and terrifying in nature.relate events having to do with highly privileged individuals.

Which of the following events of the story actual occurs first in the sequence of events

Based on this excerpt, charlotte smith and reverend walsh