How is mass wasting different from other forms of erosion?
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a. it takes millions of years.
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b. it involves chemical reactions.
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c. it involves physical forces.
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d. it happens suddenly.

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.