Berlin is the correct answer because it is the capital of Germany. Berlin has been the capital of Germany since the country's reunification in 1990. It is a major city known for its rich history, vibrant culture, and significant political and economic influence. Berlin is home to numerous landmarks, including the Brandenburg Gate, the Berlin Wall, and the Reichstag building. It serves as the political center of Germany, housing the country's government institutions and foreign embassies. Additionally, Berlin is a global hub for arts, education, and technology, making it a significant city on both national and international levels.