The factor that best explains the large concentration of population in Java is?

The factor that best explains the large concentration of population in Java is fertile soils. Java is one of the most densely populated islands in the world, with a population of over 140 million people. The island has a tropical climate and is home to several active volcanoes, which have contributed to the formation of nutrient-rich soils that are ideal for agriculture. The availability of fertile soils has made Java an important agricultural region, and has supported the growth of a large population. The island is known for its production of rice, tea, coffee, and other crops. While nearness to the sea, large mineral deposits, and industrial agglomeration may also have played a role in the development of Java, the availability of fertile soils is the primary factor that has driven the island's population growth.