D i am pretty sure that is the best answer plus alaska was into fur
Answer:
Shale.
Explanation:
It is composed of silt or clay that has been compacted or squeezed together to form a solid rock.
Many rural, and country areas. That is why cities like New York City, Dubai, Shanghai have a high population density. They are cities not rural and country area. Hope this helps!
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No barriers to trade from nation to nation
