Final answer:
The early peoples who stayed in what are now the Northwest Territories and Alaska were likely Indigenous groups who developed lifestyles suited to those areas. Others moved eastward and southward across North America, forming new cultures and societies.
Step-by-step explanation:
Some early peoples remained in what are now the Northwest Territories & Alaska. These groups likely consisted of Indigenous peoples who first inhabited these regions thousands of years ago. They developed ways of life suited to the harsh, cold climates of these northern regions.
Others moved eastward and southward, migrating across the rest of the North American continent. These migrations could have been driven by factors such as changes in climate, the pursuit of game, or the desire to explore new territories. As a result of these migrations, different cultures and societies developed across the vast spaces of North America.
Learn more about Early Peoples' Migration