21
On the basis of their origin, majority of natural freshwater lakes in the world are-
EXPLANATION
Inland & Estuarine Fisheries Resources
- Geomorphological Origin of World's Freshwater Lakes:
- More than $70\%$ of the world's natural freshwater lakes (including the Laurentian Great Lakes of North America and thousands of kettle lakes in Canada, Scandinavia, and Russia) were created by glacial activity during Pleistocene continental glaciations.
- Glaciers carved deep rock depressions (cirque and tarn lakes) or dammed drainage channels with glacial terminal moraines.
- Correct Option: Option 3 (Glacial).
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