An idiom is a phrase used to represent something that has nothing to do with it and is not literal. For example: raining cats and dogs means it's raining hard and not literally raining animals. Seething with rage is not an idiom as seethe basically means mad or angry. Angry or mad with rage can be literal and is not an idiom.
The correct answer for the question that is being presented above is this one: "first-person or third-person omniscient." If the story "Two Kinds" had been told through Suyuan's point of view, the type of narration that would be appropriate is that first-person or third-person omniscient.
Charles Boardman Hawes (1889-1923) was an American author of both fiction and nonfiction stories of the sea, well known for three historical novels.