The correct option is D North- Eastern USA
The densely populated
parts of the world with more than 200 persons on every sq km. These are the North -Eastern
part of U.S.A., North-Western part of Europe,
South, South-East and East Asia. Whereas, the delta river valleys of Central USA, Tropical West Africa, Eastern Europ, Southern part of Russia, Central China, the Deccan Plateau of India, and some of South America have a moderate density of population.