Final answer:
The shantytowns, such as the one in Seattle, were called Hoovervilles during the Great Depression.
Step-by-step explanation:
The shantytowns that developed during the Great Depression, including the one in Seattle, were called Hoovervilles. These were temporary settlements that formed in response to the high levels of unemployment and poverty during that time period. They were named after President Herbert Hoover, who was heavily criticized for his handling of the economic crisis.