Is referred as structure because it is built arranged,organized, and sequence because it describes the ways in certain order.
Epistolary form is the art of moving the story forward with letters. Novels written in this form usually incorporate "letters" between characters that show what the story is like. It needs not necessarily be letters and can include news paper articles or similar. An example of such a novel would be Bram Stoker's Dracula.
He literary techniques and figures of speech included in Robert Browning’s poem “My Last Duchess” include the following (highlighted with italics):
The correct answer is - The insane live in a reality of their own.
The narrator's reality isn't the same as the old man's reality - this is because the narrator is insane. However, he wasn't always insane - what drew him to madness is the old man's 'eye of a vulture.' He became fascinated with the eye, started hating it so much that he wanted to kill the old man, which he did. After that, his madness didn't go away - it just grew stronger until he admitted his crime.