Low crop prices and high machinery costs pushed submarginal land into production. Farmers have also begun to abandon soil conservation practices.
These events laid the foundation for the severe soil erosion that causes the Dust Bowl. In the 1930s, local drought conditions combined with high winds combined with aggressive and poor agricultural techniques to create massive dust storms that displaced thousands of people from their homes and destroyed poor, rural America. People migrated in large numbers. The Dust Bowl refers to a period of drought in the United States in the 1930s. The Dust Bowl was a period of dust storms that damaged the country's agriculture and ecosystems in the 1930s.
The dust bowl was caused by severe drought and failure of dry farming. Suffocating dust and high winds blew from Texas to Nebraska, causing crop failures and killing people and livestock. Poverty was another cause of the Dust Bowl, forcing people to adopt poor farming techniques. Another factor was the high temperature. This worsened the Great Depression and worsened the economy.
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The Great Migration heavily affected both "b) the South and the North", as it saw a massive migration of African Americans from the farms in the South to the cities in the North.
French and india war
Stamp act
Boston massacre
Boston tea party
Intolérable acts
First continental
Probably B I'm not sure though