Which of These Properly Illustrates the Principle of Isostasy

question 4

Multiple Choice

Which of these properly illustrates the principle of isostasy?

• A) High-density crust floats on top of low-density mantle.
• B) Mountains stand high because they are gravitationally balanced by their deep crustal roots.
• C) When weight is added to the crust,the crust responds by rebounding upward.
• D) When material is removed from the crust,the crust maintains the new,lower elevation.

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