Which environmental changed allow people to travel by land between Asia and North America A human adaption to Arctic environments be the introduction of horses to North America C the formation of ice sheets on land D a rise in ocean temperatures

Answer 1

The correct answer is C: the formation of ice sheets on land.

During the last Ice Age, lower sea levels due to large amounts of water trapped in ice sheets allowed for a land bridge called Beringia to emerge between Asia and North America. This land bridge facilitated the migration of people and animals between the two continents.