Answer:
A.
Explanation:
Most animal exchanges came from the Old World to the New World.
An event that sparked competition and encouraged americans to invest in science
Answer:
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Explanation:
Answer:
Explanation:
Geographic and economic factors that influenced westward movement
Population growth in the eastern states.
Availability of cheap, fertile land.
Economic opportunity, e.g., gold (California Gold Rush), logging, farming, freedom (for runaway slaves)