Cro-Magnon people lived as hunter-gatherers, cooperating in bands to hunt animals. During the Ice Age, much of the Earth's water was frozen in glaciers, lowering sea levels and exposing a land bridge between Asia and North America. Hunters used this land bridge to migrate to the Americas in pursuit of animals, leading to the settlement of people and animals on the newly accessible land.

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Cause:
Their way of life centered on hunting
Cro-Magnon bands cooperated to hunt
Much of Earth's water was frozen into glaciers
Animals crossed the land bridge to North America
After the Ice Age, a land connected Asia and America
People fashioned antler and bone spear throwers
this led to yearly meetings where exchanges of information regarding animals took
Effect
the level of Earth's oceans dropped.

2. allowed hunters to stay farther distance from animals, thus making it less dangero
Peopleand animals migrated to the Americas.
hunters followed the animals across the land bridge.
so hunters moved often.