Final answer:
The central idea of the passage called the moving experience is a move from one country to another, which involves learning a new language and facing challenges like making new friends in an unfamiliar country.
Step-by-step explanation:
The central idea of the passage called the moving experience is A move from another country to the United States or from another U.S. location to where you are now. This can be inferred from the context of the passage, which mentions becoming fluent in another language and facing the challenge of making new friends in an unfamiliar country.