Both South Asia and Western Europe have high population densities. How does the distribution of these two populations differ? Most of South Asia's population is on several island chains. Western Europe's population is based on the mainland. South Asia's population is located next to major rail lines. Most of Western Europe's population lives far from transportation hubs. South Asia's population is highly mobile and changes frequently. Western Europe's population stays in the same place. South Asia's population is centered along several rivers. Western Europe's is evenly spread throughout the region. South Asia's population mostly lives in the countryside as farmers. Western Europe's population mostly lives in large cities.