Which of the following earth materials is most likely to produce a vertical cliff that is fairly stable?

Question

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Crystalline igneous rock such as granite is the most likely to produce a vertical cliff that is fairly stable because it is a strong and hard rock that resists weathering and erosion. Sedimentary rocks and loose sedimentary material are more prone to erosion and slumping, while metamorphic rocks may have weak planes of cleavage that can result in instability. Lava flows may also break apart and erode over time.

Which of the Following Earth Materials Is Most Likely to Produce