2. which of the following was a cause of the ecological disaster known as the dust bowl? a. excessive rainfall that year b. the plowing under of native grasses that kept topsoil in place c. a massive earthquake that loosened the topsoil d. a flood in california

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.