The Intolerable Acts was the tip of the iceberg to start the American Revolution.
War, hate groups, and political disagreements
If this isn’t the answer you’re looking for what’s the answer choices (If there is any)
Protests against the Vietnam war
Machines made it easier to complete hard tasks(such as the cotton gin) and they also could get work done faster than humans, which lead to a much grander scale of production in goods. Hope this helps :D