Answer: View answer in the explanation below.
Explanation: "Primary Lessons" is a story about a young girl who is split between two cultures. The narrator is a Mexican-American girl who is struggling to reconcile her identity with the expectations of her family and the larger society. The central idea of the story is that the narrator grows up feeling caught between two worlds and trying to find her place in both.
One detail that conveys this central idea is the narrator's language. She speaks English at school and with her friends, but Spanish at home with her family. She feels like she has to switch between the two languages depending on the context, and this creates a sense of disconnection between her different identities. For example, she describes feeling like "two people" when she speaks Spanish with her grandmother, because it is a language she associates with her family and her Mexican heritage, which feels separate from her English-speaking self at school.
Another detail that conveys the central idea is the narrator's experience with the Mexican-American War. She learns about the war in school, but feels uncomfortable with the way it is portrayed as a victory for the United States over Mexico. She feels a sense of loyalty to both countries, but struggles to reconcile the conflicts between them. This shows how the narrator is caught between two cultures, trying to find a sense of belonging in both but also grappling with the ways in which they are at odds with each other.
Overall, the use of language and the narrator's experience with the Mexican-American War are two details that convey the central idea that the narrator is split between two cultures from a very young age. The story shows how this split creates a sense of tension and confusion for the narrator, as she tries to navigate the different expectations and identities that come with each culture.