Which has the greatest effect on where people live in Japan, China, or India?

large river deltas
deserts
longitude
large ocean ports

The answer for which factor has the greatest effect on where people live in Japan, China, or India would depend on the specific country being discussed. Here is a breakdown for each country:

Japan: Large Ocean Ports - As an island nation, Japan heavily relies on its coastal areas and large ocean ports for transportation, trade, and economic activities. The majority of Japan's major cities and population centers are located along the coast.

China: Large River Deltas - China has a vast network of major rivers like the Yangtze and Yellow River. The large river deltas created by these rivers, such as the Pearl River Delta and Yangtze River Delta, provide fertile agricultural land and are also significant for transportation and trade. Consequently, many Chinese cities and population concentrations are located in and around these river deltas.

India: Large River Deltas - Similar to China, India has several major rivers like the Ganges, Brahmaputra, and Godavari, which create large river deltas. These river deltas provide fertile land for agriculture, and many Indian cities and population centers are situated in proximity to these deltas.

While deserts and longitude can also have some impact on settlement patterns in these countries, the presence of large river deltas and, in the case of Japan, large ocean ports tend to be the primary determinants for where people choose to live.