To make the reader wonder how baseball became the national sport of the United States
Step-by-step explanation:
The author ends the paragraph with a question because the author wants the reader to know how a sport became so popular that everyone left their work no matter how important just to watch a pitch in baseball.
Also, the reader wants the readers to find why baseball made millions of people drive crazy that they head out to fields to watch the game. Also, the author is trying to communicate with the reader and creates an interest for the readers on what happens next.