Read the story Westward Adventures: Chapter 1: All Aboard!

(6) Sally and Beth settled into the cushioned seats, their suitcases stashed under their chairs. Sally stared out the dusty window at the flat, sunbaked landscape. She wondered how different life would be in California. Their father had left them with their grandparents in Omaha while he traveled to California to seek his fortune in the gold rush. She took his last letter from her pocket and read it for the hundredth time.

How does paragraph six provide meaning to the overall story?

In paragraph six, the reader learns how the two sisters will be traveling on the train and that they sit next to each other.
In paragraph six, the reader learns that Sally really misses her father and that the girls will now be living with him in California.
In paragraph six, the reader learns what the two sisters want the most: to see their grandparents again.
In paragraph six, the reader learns why the girls are traveling alone, without any parents, and the reader can sympathize.