Respuesta :

Jenirelle

Answer: D)

  • A) Farmers in the Central U.S. had plowed grasslands to grow food crops to feed the increasing human population.
  • B )They left the fields plowed and bare in the winter months when crops were not grown, and this left the soil exposed to wind.
  • C) A long drought in the 1930s left the exposed soil especially dry due to the lack of precipitation.
  • D) With the advent of pesticides, minerals in the ground were leached.

Explanation:

During the 1930's  several prairie regions in America experienced a major drought. While the term Dust Bowl initially referred to the affected region, the term eventually came to describe the dust clouds formed by the phenomena. Farmers in the affected area began to utilize mechanized tools for ploughing and harvesting due to industrialization and an increased demand for food.

Without further understanding of grassland ecology, farmers removed native plants and shrubs leaving the soil exposed during the wintertime. With the exposure of topsoil to the wind and a prolonged lack of rainfall, the loose dry soil became the large clouds of dust that gives the phenomenon its name.