GENERAL KNOWLEDGE

Detailed explanation-1: -Cities were often founded on the banks of rivers because of availability of water and fertility of soil. Many big cities of the world are shaped and known by the river that runs through it.

Detailed explanation-2: -Throughout history, cities were built around ports because ports provided opportunities for trade, jobs, and transportation. People chose to move to coastal cities for these reasons. Two of the biggest cities in the United States, New York City and Boston, developed around ports.