Final answer:
The National Socialist (Nazi) Party gained significant popularity in Germany due to the Great Depression.
Step-by-step explanation:
The National Socialist (Nazi) Party first gained significant popularity in Germany due to the Great Depression. The economic crisis caused by the Great Depression made the German people desperate and led to a loss of confidence in the Weimar Republic's ability to address their needs. Adolf Hitler and the Nazi Party capitalized on this widespread discontent and offered promises of economic recovery and national pride, which resonated with many Germans.
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