Solution:
Mumbai port handles half of the country's foreign trade. Mumbai has a natural harbor and it is the biggest seaport of the country. Mumbai port is situated closer to the general routes from the countries of Middle East, Mediterranean countries, North Africa, Europe, and North America where the major share of country’s overseas trade is carried out.

Solution:
Narmada river flows through rift valley and hence is not able to pick up much sediments and flows westward into the Arabian sea. An estuary is a place where river water meets the saline water of sea.

Solution:
Mahanadi is an east flowing river of the Peninsula. Major peninsular rivers flow from west to east due to the gradient of land but narmada and tapi flows in the opposite direction because they do not flow on the plateau surface but in rift valleys and these valleys happen to have an opposite gradient.

Solution:
Mula - Mutha river is formed by confluence of Mula and Mutha rivers in Pune. After confluence of Mula and Mutha the combined river Mula-Mutha flows and joins Bhima river which in turn is a tributary to Krishna river.

Solution:
Eden canal derives its water from Durgapur Barrage built across Damodar river in West Bengal. It is a part of Damodar river valley project.

Solution:
Brahmaputra, Indus & Sutlej have their source of origin in Tibet.

Solution:
Sivasamudram Island is a small city in the Mandya district of Karnataka. It lies on the bank of river Cauvery.