Why do geologists think Earth's core contains mostly iron?
A. The crust contains a mixture of iron and silicon.
B. The crust contains no nickel.
C. Other orbiting bodies contain more iron than Earth's crust does.
O D. The moon's crust contains far less iron than Earth's crust.

Here the thinking should be earth core that comprises iron since the earth should contain the powerful magnetic field that is due to the molten iron in the core.

Also, there should be constant movement leads to the electrical current.

hence, the option c is correct.

Learn more about iron here: https://brainly.com/question/16714091

Why do geologists think Earth's core contains mostly iron? A. The crust contains a mixture of iron and silicon. B. The crust contains no nickel. C. Other orbiting bodies contain more iron than Earth's crust does. O D. The moon's crust contains far less iron than Earth's crust.

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Reason for thinking of geologists:

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Why do geologists think Earth's core contains mostly iron?
A. The crust contains a mixture of iron and silicon.
B. The crust contains no nickel.
C. Other orbiting bodies contain more iron than Earth's crust does.
O D. The moon's crust contains far less iron than Earth's crust.