The answer is assailing I think
Annanannajajajaananakajajaja
The Paraguay and Parana Rivers jointly form a 3,302-kilometer waterway system connecting Argentina, Brazil, Bolivia, Paraguay, and Uruguay. It is a major transportation route between the continent's interior and the Atlantic Ocean through the Rio de la Plata, and carries nearly 80 percent of Paraguay's trade.
hope it helps:)
Most likely North America
Most major cities there are on or near a coast, meaning the most people live along each coast.