One factor that led to reform in the late 1800s was

one factor that led to reform in late 1800s was an increase in nationalism

Explanation:

a dicrease in economic growth. An increase in urban growth. an dicrease in rural growth.

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2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.