crustal deformation frequent earthquakes glacial movement volcanic eruptions
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When bedrock in Massachusetts is examined, it often appears scraped and polished. Which of the following most likely caused the bedrock to appear scraped and polished?
Possibilities:
- crustal deformation
- frequent earthquakes
- glacial movement
- volcanic eruptions

glacial movement