Migrants who left the great plains behind during the 1930s often ended up living in poverty in crowded camps. gained great wealth and prosperity in california. had abundant food, clothing, and shelter. often ended up living comfortably in their own houses.

The correct answer here is the first option.

Here we are talking about the Dust Bowl Migration which saw people from the Midwestern Dust Bowl (where part of the Great Plains is located) move to California due to droughts and dust storms which made farming  unsustainable. So they moved and were really poor and had to live in crowded poverty camps.

Migrants who left the Great Plains behind during the 1930s often ended up living in poverty in crowded camps. The answer would be the first option. So this is the Dust Bowl Migration in which people migrated to California on that time when they experience Dust Storm.