What is a flashback?

a. an object or sensory experience that triggers memories
b. a device in which the story opens and ends in the same moment
c. a point in the story that shows something that happened earlier
d. a sudden moment of realization or change for a character

Robert was not waiting for her in the little parlor. he was nowhere at hand. the house was empty. but he had scrawled on a piece of paper that lay in the lamplight: "i love you. good-by—because i love you." what significant idea, presented throughout the novel, does robert's final departure and note highlight? edna is ultimately alone in her rebirth. edna needs to find solace in her children. edna will never be truly loved by anyone. edna should not have forsaken her family.