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
.
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.
I'd have to say gas because it usually doesn't change at all
<span>a. the region’s muslims received their medical care at the madrassas. b.the madrassas were the schools that taught the islamic religion. c. the madrassas applied islamic law for the muslim population. d. the region’s muslims bought islamic foods from the madrassas.</span>
Radical Leadership : Gradpoint.
