What IS the Cold war?
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I won't answer it for you since you should know.
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What are the effects and what did America and Russia do?
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Build nuclear missiles, submarines, etc.
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But summarizing it all up, the Cold War caused the world's two superpowers to: compete economically and militarily.
I have chose primary source to be the answer. Check out the definition of "primary source." secondary wouldn't make sense here.
Answer:
tectonic plates
Explanation:
The lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates.
