Which is the world’s largest freshwater lake in terms of volume?

Answer: (1) Lake Baikal

Explanation:

Lake Baikal is the world’s largest freshwater lake in terms of water volume. 

• It is located in southern eastern Siberia, Russia, near the border with Mongolia. 
• It is also the oldest existing freshwater lake, with an age of about 20-25 million years, and the world’s deepest lake, reaching a maximum depth of 1,642 metres. 
• It was declared a UNESCO World Heritage Site in 1996 due to its exceptional natural significance.

About Other Options: 

(b) Lake Michigan-Huron: Lake Michigan is the third largest of the five Great Lakes of North America and the only Great Lake located entirely within the United States. It is connected to Lake Huron through the Straits of Mackinac, and both lakes maintain nearly the same water level due to this hydrological connection.

(c) Caspian Sea: The Caspian Sea is the world’s largest enclosed water body surrounded by land on all sides. It is an endorheic basin, meaning it has no natural outflow. Although some northern parts contain nearly fresh water, it is not a freshwater lake because much of its water is saline.

(d) Lake Superior: Lake Superior is the largest freshwater lake in the world by surface area. It covers about 82,100 sq. km and is shared by Canada and the United States. However, it is not the largest freshwater lake by water volume.