Question

What geologic event caused the dry flat physical landscape of the prairie
A) tectonic plates under the earth shifted
B) glaciers in the arctic circle melted
C) wind storms in the midwest flattened the land
D) fires in the midwest scoured the soil

Answer 1

I think its D

Answer 2

Disagree.

Prairies are one of the most recently developed ecosystems in North America, formed after the period of Pleistocene glaciation. About 18,000 years ago, much of Illinois was covered by glaciers. As the glaciers melted, the land was covered at first with tundra type vegetation, then by spruce forests.