Final answer:
Niksic and Cetinje are cities located in Montenegro, which declared its independence from Serbia in 2006 and is working on economic development and integration into global markets.
Step-by-step explanation:
The country that has Niksic and Cetinje is Montenegro. In the Balkan Peninsula, the region's history has been significantly shaped by the fall of Yugoslavia. The former Yugoslav region of Montenegro declared its independence from Serbia in June 2006. Following its declaration, Montenegro has been focused on developing its economy, including efforts toward World Trade Organization (WTO) membership and privatization of its main industries, particularly in the area of tourism.
Niksic is Montenegro's second-largest city and is known for its industry and cultural heritage, while Cetinje is known as the Old Royal Capital of Montenegro and is a significant cultural and historical centre. Both cities play important roles in the country’s cultural and economic landscape.