Q. Which of the following mountain ranges form the longest mountain chain in the world?
Answer: The Andes of South America
Notes: Andes is the world's longest above-water mountain range, spanning over 4,300 miles. It's located on the South American continent and crosses the borders of seven countries: Venezuela, Bolivia, Chile, Colombia, Ecuador, Peru, Argentina. The Andes stretches from Tierra del Fuego in the south to the continent's northernmost coast on the Caribbean Sea. It's also known for its volcanoes. The longest mountain range on Earth is the mid-sea edge, which spans over 40,389 miles. Around 90% of the mid-sea edge framework is under the sea. The mid-ocean ridge system is part of every ocean in the world and marks the boundaries of the oceanic plates. It rises to 6,600 feet above the deepest part of the ocean basin.