Answer:
First line
Step-by-step explanation:
The reason is that the first line explains the main points such as when the story is set, the city we are in and where in that city we are. From just reading the first line we know what is happening, we are in 1893 in the World's Columbian Expedition, everything else is just adding more detail and giving more insight as to what is happening.
Hope this helps!
Sincerely, Mathwork00