B. Their remote location has kept out invaders.
I think The upper midwest is the best choice.
<span>#1) In each box, write the appropriate type of rock.
Answer:
A: Permian
B: Carboniferous
C: Devonian
D: Silurian
E: Cambrian
Volcanoes released carbon dioxide, water vapour and nitrogen. This gases formed the earth’s early atmosphere. These gases were released from volcanoes.
I hope it helps, Regards.<span>
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