Artificial and natural lakes

Kodaikanal Lake in Tamil Nadu is an artificial lake created by constructing a dam across mountain streams in the Kodaikanal hill station area. It was created in 1821 for irrigation and water supply purposes. In contrast, Kolleru Lake in Andhra Pradesh is a natural freshwater lake formed by the depositional action of rivers; Nainital in Uttarakhand is a natural glacial lake formed in a glaciated valley; Renuka Lake in Himachal Pradesh is also a natural lake created by tectonic activity. Only Kodaikanal is man-made/artificial. > Kodaikanal = Artificial lake (dam-created, 1821); others = Natural lakes. Answer: a.