Japan is densely populated because it is an island nation which means that there is not a lot of territory for the Japanese to spread out and inhabit. In addition Japan has a large population for the small territory that exists. A final reason is that much of life in Japan is centered around urban zones, which means that most of the population lives in these urban environments which are very dense.
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Answer:
Burial, I believe is the right answer
I believe that the answer is A.