Why is the careful observation of the key sentence important in identifying the main idea of a paragraph?

Without saying a word, berthe seized the child, kissed it and hugged it to her. then she raised her tear-filled eyes to him, asking: "did you say that the mother was dead? " he answered: "yes—just now—in my arms. i had broken with her since summer. i knew nothing. the physician sent for me." then berthe murmured: "well, we will bring up the little one." in this excerpt from "a wedding gift," the scene is an example of situational irony because berthe behaves in a surprising way an example of the theme of redemption because the child has another chance an example of dramatic irony because berthe behaves in a surprising way an example of the theme of tragedy because the infant's mother has just died

The novel begins with a flashback. what do you think is its purpose? what do you learn about the narrator?

Auden's musée des beaux arts" and williams's "landscape with the fall oficarus" share which common element?