Multiple choice

How did early humans probably migrate from Asia to North America?

  1. on icebergs

  2. over a glacier

  3. on horses

  4. over a land bridge

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

During the last Ice Age, lower sea levels exposed a land bridge (Beringia) connecting Siberia in Asia to Alaska in North America, allowing early humans to migrate between the continents on foot.