How did arguments between the author and his mother change after the author turned 8?

Does anyone know the answer to the question?

Who is ¨ the guilty party¨ at the end of the text, and how do his actions contribute to the storys theme?

Realism was a fairly influential and widespread literary movement in the united states in the latter half of the nineteenth century. which american writer is among the pioneers of american realism? a. ernest hemingway b. f. scott fitzgerald c. j. d. salinger d. mark twain