Final answer:
The full-scale mobilization for World War II fundamentally ended the Great Depression, as increased industrial demands and federal economic management created jobs and revitalized the American economy.
Step-by-step explanation:
What really cured the Great Depression was not solely the New Deal programs, but the eventual involvement of the United States in World War II which led to an increase in industrial production and job creation. While the New Deal did offer significant relief and started the economy's recovery, it was the wartime economy that provided full employment and transformed the nation’s economic structure. The industrial demands of the war effort effectively ended the Great Depression by requiring massive production and labor, which put millions of Americans back to work and pumped money back into the economy. Military spending and mobilization followed, which required the federal government to manage the economy on an unprecedented scale.