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I believe the answer to your question is...
Letter B.
Chiefdoms were used by the Cherokee.
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Understanding Earth's surface will help students appreciate the uniqueness of our planet and may encourage them to take action to protect it. This unit also addresses topics such as: cave formation, islands, various bodies of water, valleys, impact craters, and landforms that exist under the ocean.
Facts about landforms on earth: A landform is a natural or artificial feature of the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography.
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