Answer:
They hiked over a land bridge
Explanation:
The prevailing theory proposes that people migrated from Eurasia across Beringia, a land bridge that connected Siberia to present-day Alaska during the Last Glacial Period, and then spread southward throughout the Americas over subsequent generations.
Method of science. Psychologists rely on scientific methods for almost every topic that they research on. They need to confirm their hypothesis through observation, measurement and experiment.
The slave trade compromise wanted the free states of the North Congress to have the power to regulate commerce