The author calls Miss Lottie’s house "the most ramshackle of all our ramshackle homes." It has "rickety frame siding," and is a
"gray, rotting thing with no porch." Also, Miss Lottie’s "queer-headed son" sitting on a "squeaky rocking chair" adds to the setting. What can the reader infer based on this description?
The term ramshackle seems to infer that the houses in the neighborhood are not in tip top shape , so the neighborhood consists of people who are not financially elevated. But Miss Lottie's home is the worst of them all. It's old and unkept. Which could suggest that Miss Lottie herself is old.
'That' is A, a demonstrative pronoun. Because you are referring to that person, you are basically pointing at your cousin, therefore it must be a demonstrative pronoun.
