Question

a main indicator of the spread of homelessness during the great depression was
bread lines.
westward migration.
hoovervilles.
unemployment.

Explanation:

Hoovervilles were shantytowns built by homeless people across the U.S. during the Great Depression, directly representing the spread of homelessness. Bread lines relate to food insecurity, westward migration was a response to economic hardship, and unemployment was a root cause, not a direct indicator of homelessness spread.

Answer:

C. Hoovervilles.