Final answer:
The first Texans entered North America through overland migration through Bering Land Bridge and arrival by sea and coastal migration.
The answer is option ⇒a.
Explanation:
According to the coastal migration theory, some peoples arrived in the Americas by following the coast of land across Asia and the Bering Land Bridge, down the coast of North America to South America.
The rich marine environment and the faster and easier travel by boat would have supported this migration theory. So,The first Texans entered North America and then traveled to Texas through overland migration through Bering Land Bridge and arrival by sea and coastal migration.
The answer is option ⇒a.Overland migration through Bering Land Bridge