23. How did the formation of glaciers result in the first humans coming to America? a. a land bridge formed between Asia and America
b. sea levels rose and flooded coastal areas
c. the Bering Strait was created
d. two masses of land were divided

a. a land bridge formed between Asia and America

Explanation:

Climate Change allowed the biggest human migration. Due to climate change, a land bridge called  the Beringia land bridge was formed between Asia and America, that helped Paleolithic hunter-gatherers to enter North America from the North Asian via foot or mammoth.

The formation of land bridge was due to the lowering of sea level during the Last Glacial Maximum that caused biggest human migration.

Hence, the correct answer is "a. a land bridge formed between Asia and America".

it would have concentrated power in the executive branch of the government. it would have restored balance among the three branches of government. it would have set a precedent for government intervention in the economy. it would have signaled an end to all the programs of roosevelt’s new deal.

did this .

the answer is b: an economic crisis throughout the country.