Answer: D. It can melt to a depth of a few meters in summer, then refreeze in winter.
Explanation:
Permafrost is ground which remains frozen for two or more years. Permafrost consists of soil, rock and sand fused together by ice. Mostly found in areas in high altitude, the Arctic, Antarctica, it is common in periglacial environments where temperatures are below freezing
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The topmost layer of permafrost can melt in summer and refreeze in winter. This thawing and refreezing produces a ground pattern called columnar joints similar to the one formed when molten lava cools.
The answer is all of the above.
Tectonic uplift is a geologic uplift of the Earths surface that is attributed to plate tectonics. It’s basically like mountain building because tectonic plates are moving up creating mountains and hills
I think the answer is D) Medicine.
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the answer to this question is A
