The effects of the invention of the steamboat include the following:
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Increased travel westward: The steamboat made it easier and quicker for people to travel to and settle in the western territories of the United States.
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Allowed cheap movement of goods: Steamboats facilitated the transportation of goods along rivers, reducing the cost and time required for shipping compared to overland transportation.
The other options, "slowed relocation of Native Americans" and "expanded rights for African Americans," are not typically considered direct effects of the invention of the steamboat.
So, the correct responses are:
- Increased travel westward
- Allowed cheap movement of goods