Niamey is the capital of Niger. It is the largest city in the country and serves as its administrative, cultural, and economic center. Located on the banks of the Niger River, Niamey is known for its vibrant markets, colonial architecture, and cultural attractions such as the National Museum of Niger. The city plays a significant role in the political and social life of Niger, hosting government institutions, international organizations, and diplomatic missions. Niamey's selection as the correct answer is supported by its status as the capital and its importance in the country's overall development and governance.