Ganges, Brahmaputra, Mahanadi, Cauvery, Narmada, Godavari and Krishna are extensive areas of

Correct Answer: Inland fisheries
Ganges, Brahmaputra, Mahanadi, Cauvery, Narmada, Godavari and Krishna are extensive areas of Inland fisheries. Inland fisheries are "any activity conducted to extract fish and other aquatic organisms from inland waters”.