The factor that helped the United States in making the inland transportation and commerce to be possible is in letter C. The intricate river system. I hope you are satisfied with my answer and feel free to ask for more if you have clarifications and questions.
Answer:
Most of Earth's freshwater is locked in ice
Over 96% of Earth's water is saline (salty) and found in the ocean. Only a little over 3% of Earth's water is fresh. Most of that freshwater (68.7%) is frozen in glaciers and ice caps.
Explanation:
Answer: "the Earth's mantle" .
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The asthenosphere "floats" on the "mantle" [of the interior] Earth.
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