evidence: South Korea is divided into 17 first-tier administrative divisions: [...] Metropolitan cities are the highest level of administrative division in South Korea. They are largely autonomous and have their own elected mayors and city councils. Metropolitan cities are home to South Korea's largest and most important cities, including Seoul, Busan, and Daegu. [...] Provinces are the second-highest level of administrative division in South Korea. They are governed by elected provincial governors and provincial councils. Provinces are responsible for providing a variety of services to their residents, including education, healthcare, and infrastructure development.