Answer:
2?
Why? According to study.com the four main causes of the great depression include stock market crash, bank failures, overproduction and drought.
Many primary civilizations started in river valleys because for the cities in each civilization an important portion of the population existed in cities. Large-scale farming was a requirement to feed the large populations. Fertile due to flooding the land by rivers was home to lush plant life and an outstanding place to plant and grow crops. The close source of water permitted for irrigation for the large-scale farming as well as drinking and bathing. Water also intended animals and animals meant food so this was another advantage to settling in river valleys. Settling and living in river valleys later main to further development of civilizations and new patterns of living such as trade and communication by means of the river for transportation.
D.D.He built up a strong navy and army after studying the militaries of Western nations.
James Monroe declared that no Europe nation should attempt to regain the newly independent latin America colonies.