Answer : 3. "Cauvery Delta"
Explanation :

Answer: C) Cauvery Delta Explanation: Cauvery river also known as Dakshin Ganga is one of the major rivers in the south Indian region. On its course to Bay of Bengal, Cauvery gets branched into many distributaries forming many fertile deltas. It is for this reason that Cauvery is also known as the “garden of southern India.”