What is the leading theory about how early humans arrived on the American continents?(1 point)ResponsesA. They walked from Africa to South America when those two continents were part of the same landmass.B. They walked from Asia to North America over a strip of land that has since been covered by the ocean.C. They sailed in large ships from Australia to North America.D. They canoed from Antarctica to South America when the climate there became too harsh.

Question

What is the leading theory about how early humans arrived on the American continents?(1 point)ResponsesA. They walked from Africa to South America when those two continents were part of the same landmass.B. They walked from Asia to North America over a strip of land that has since been covered by the ocean.C. They sailed in large ships from Australia to North America.D. They canoed from Antarctica to South America when the climate there became too harsh.

Answer 1

B. They walked from Asia to North America over a strip of land that has since been covered by the ocean.

Answer 2

The leading theory about how early humans arrived on the American continents is B. They walked from Asia to North America over a strip of land that has since been covered by the ocean.

Answer 3

The leading theory about how early humans arrived on the American continents is option B: They walked from Asia to North America over a strip of land that has since been covered by the ocean. This theory is known as the Bering Land Bridge theory or the Beringia theory.

To understand how this theory came about, scientists have studied the geographic and climatic changes that occurred thousands of years ago. About 20,000 to 25,000 years ago, much of the Earth's water was trapped in extensive ice sheets, causing the sea levels to be much lower than they are today. This drop in sea level created a land bridge known as Beringia that connected Asia (specifically Siberia) and North America (specifically Alaska).

Based on archaeological evidence, it is believed that early humans, referred to as Paleo-Indians, migrated from Siberia across the Bering Land Bridge and into North America. Over time, these early humans gradually populated the American continents, eventually spreading southward into Central and South America.

Different pieces of evidence support this theory, such as similarities in stone tools found in both Siberia and North America, as well as genetic studies that show a close connection between Indigenous peoples of the Americas and those from Northeast Siberia.

To learn more about this theory and the migration of early humans to the Americas, you can refer to scientific research articles, books, or visit reputable archaeological and anthropological websites.