The theory of glacial formation is the evidence of once have glaciers. Hence option C is correct.
What is glacial formation?Glacial formation is defined as any substantial body of perennial ice that occurs on land as a result of the recrystallization of snow or other solid precipitation and demonstrates previous or present flow. Snow does not melt when it is cold. It gathers and solidifies into ice. A glacier, a vast mass of ice with a thickness of several dozen meters, is created as a result of this slow transformation, which can take several decades.
Glacial striations, or scratches on the bedrock caused by rock blocks buried in the ice as the glacier moves, provide more proof. These depict the glacier's orientation and imply that the ice came from a single central location.
Thus, the theory of glacial formation is the evidence of once have glaciers. Hence option C is correct.
To learn more about glacial formation, refer to the link below:
https://brainly.com/question/22647485
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