Correct Answer: (c) Andes mountain
Solution:Among the given options Ural mountain, Aravalli mountain and Appalachian mountain are an old folded mountain but the Andes is a young folded mountain. Other young folded mountains are Rocky, Alps, Himalaya etc. Andes mountain is about 5,500 miles (8,900 km) long and second only to the Himalayas in average elevation. It consists of a succession of parallel and transverse mountain ranges, or cordilleras, and of intervening plateaus and depressions. The highest elevation in the Andes is Mount Aconcagua in Argentina, which is 22,841 feet (6,962 m) above sea level. The Andes are also home to the world's highest volcano when measured above sea level, the Ojos del Salado on the Chile-Argentina border. The Andes Mountains are over 50 million years old, they were created when the South American and Pacific tectonic plates collided.