The answer is D (using intensive farming practices that removed protective grasses.)
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The problems that led to the Dust Bowl were contributed to by farmers using intensive farming practices that removed protective grasses.
Over-farming and dry farming techniques depleted the topsoil, and overgrazing cattle left parts of the Great Plains barren. Plowing fields for annual planting exposed the soil to the sun and wind, resulting in wind erosion and the creation of huge dust storms.
Farmers had also moved away from traditional practices such as crop rotation and allowing land to lie fallow between plantings, which further contributed to the problems that led to the Dust Bowl.
Farmers' intensive farming practices that removed protective grasses significantly contributed to the Dust Bowl. This environmental disaster resulted from the combination of over-farming and severe drought, leading to massive soil erosion. The correct answer to the question is option D.
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