What is responsible for the formation of prairie potholes? 

A)  meteor impacts 
B)  Earthquakes 
C)  retreating glaciers 
D)  volcanic craters

Prairie potholes are depressions in the ground that were formed by glaciers during the last ice age. As the glaciers receded, they left behind large amounts of sediment and ice, which eventually melted and created the potholes. Prairie potholes are typically found in the Great Plains region of North America, where they provide important habitats for a variety of plants and animals. Therefore, the correct answer is C, retreating glaciers.