Answer: It is related to Westward Expansion because the US was expanding westward by annexing Texas.
The loyalist were American colonists who remained themselves loyal to the British crown during the American Revolutionary War.
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Answer: The stone court was a copy of the heavens.
Permafrost refers to the fact that the ground in high latitudes which is permanently frozen - that is, which does not defreeze in the summer. It does not defreeze because it is isolated by soil - this is the correct answer - from the warmer air, so it is actually not in touch with the positive temperatures.