earths magnetic field, also known as the geomagnetic field
The dark ages in Greece lasted 300 years
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Answer:
the sometimes swampy coniferous forest of high northern latitudes, especially that between the tundra and steppes of Siberia and North America.
There's no options, so I'm not sure if this is correct but- I'd say the word that fills the blank, would be "social"
~Good luck!