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.
Answer:
Sierra Madre Occidental
Explanation:
this mountain range takes up nearly 140,000 square miles of Mexico.
<u>Answer:</u>
D. Preventing people from visiting wildfire-prone areas
This would cause the greatest reduction of wildfires
<u>Explanation:</u>
Anthropogenic activities are the main source for forest fires. Humans intentionally or unintentionally became the reason for forest fires than lightning, rainfall deficit, and wind speed. Forest people responsible for causing fires because of shifting cultivation and livelihoods. Sub tropical forest were fired for cattle rearing becuase dense forests are not fit for cattle rearing. Increase in lightning storm also causes the forest fire. Decrease in rainfall leads to forest fire in Equator and tropical regions because of high temperature and high wind speed.
Light dependant reaction and Light independent reaction
