Ok. I have to write a DBQ on the following topic.

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The traditional rural nature of American society was threatened in the early 19th century by certain economic forces that prompted a market and industrial revolution.
Utilizing the documents and your knowledge of the period 1815-1860, analyze those forces and their impact on American society and the economy.
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Im not sure of what the "forces" are. I need 2 of them.
I am thinking of using transportation and technology improvements, but are those actually forces? Im not sure.
So could someone help me. Maybe I'm interpreting the topic wrong. idk
If you have any ideas just leave them
thanks in advance