Answer the following question given this paragraph: 

The Dust Bowl taught people that soil could be lost by plowing and growing crops. This led to the development of new ways of farming that help protect the soil. Some of the methods are described in Figure below .


Q: What historical event taught people that soil could be lost by plowing and growing crops and encouraged new methods to prevent erosion?

 Choices:

- the debris bowl

- the flow bowl

- the land bowl

- the dust bowl

A:
the dust bowl
