Which one of the following has the largest number of active volcanoes?

The correct answer is Aleutian Islands.

Key Points

• The Aleutian Islands are part of the Aleutian arc, one of the most active volcanic provinces on Earth, and they owe their existence to long-term volcanic activity. 
• The Aleutian Islands extend south-southwest for 1800 km from the Alaska Peninsula.
• It occupies a total area of 6821 square miles.
• It extends in an arc southwest, then northwest, for about 1100 miles from the tip of the Alaska Peninsula to Attu Island, Alaska, US.
• It separates the Bering Sea from the main portion of the Pacific Ocean.
• The archipelago consists of 14 large islands, some 55 smaller islands, and innumerable islets.
• The Ring of Fire also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
• The Ring of Fire is stretched to approximately 40,000 kilometers tracing boundaries between several tectonic plates including the Pacific, Juan de Fuca, Cocos, Indian-Australian, Nazca, North American, and Philippine Plates.
• The chain runs up along the western coast of South and North America crosses over the Aleutian Islands in Alaska, runs down the eastern coast of Asia past New Zealand, and into the northern coast of Antarctica.
• Bolivia, Chile, Ecuador, Peru, Costa Rica, Guatemala, Mexico, United States, Canada, Russia, Japan, Philippines, Australia, Papua New Guinea, Indonesia, New Zealand, and Antarctica are some of the important places located in the ring of the fire.
• There are 512 active volcanoes.