Answer:
Wind exists because of differences in air pressure. (Meteorologists call the force that pushes air horizontally between high and low pressure regions the "pressure gradient force.") The resulting rush of air between these two locations is the wind we experience.
A. countryside
Many reasons:
1) wrong tense for any of the other answers
2) none of the other answers provide refuge
This is true, Columbus came to the new world in 1492, and from then on, more people migrated to the new world.
I guess the answer to the blank will be:
During the second Red Scare public and government suspicious of Communism led to the blacklisting of people in various industries.
