Question

in which decade did the american dust bowl occur?
1930s
2010s
1520s

Explanation:

The American Dust Bowl was a period of severe dust storms and ecological disaster in the Great Plains region, occurring mainly during the 1930s, coinciding with the Great Depression. The 2010s and 1520s are not relevant to this event (the 1520s is too early, and the 2010s has no such dust - bowl - like event in America).

Answer:

1930's