What factor contributed to American economic growth?

In 1815- 1860 the major reason was the mass production of cotton

Explanation:

Because of slavery which ended 1865, the used slaves to produce cotton. Just think about how much they can make with cotton, clothes, book binding, coffee filters, tents. And that is why cotton made America grow cause they could sell in to other countries either through raw material or manufactured products.

the dust bowl, otherwise known as the dirty thirties, was a huge dust storm that killed multiple (and i mean  multiple) farmer's crops, leaving them homeless, and foodless, and jobless. in california, there were 5.7 million residents, and the population shrank as mexicans were repatriated. however, when the dustbowl happened, a lot of people began to move to california. by 1940, 250,000 people had arrived. therefore, your answer would be  the population increased, massively.  i hope this !

explanation:

judicial because its legislative, executive and judicial