Answer:
"The terrain is mountainous, which means there is not a lot of good land for farming. Because of the geography, the Japanese relied on the sea for many aspects of daily life. Trade with China and Korea became important to get the resources they needed. ... One of the major ideas that influenced Japan was Buddhism."
overcrowding, poor sanitation, spread of diseases, and pollution
Homogeneous region is a region where the people are similar. The answer to your question will be whichever one mentions people being the same.
It’s D, providing for a stable currency
