<span>A) provoke fear and anger in loyal Americans That whole time period was basically all of America going "But muh Russians" after World War II. </span>
The importance of this was that communists were the main enemy for the people of the western hemisphere of the world, and the Americans as leaders of the western civilization couldn´t bear the possibility of habing traitors among their government. All the propaganda against the USSR made americans saw the soviets as the worst thing that could happen to the world, and this scared them to death, that´s why when they learnt that there were communists and socialists sympathizers in the white house lead them to fear and anger.
A) rare to find and hard to form because in the passage, it mentions that you need specific conditions but they are hard to find (because they get destroyed before they are discovered)
Waterways were among humanities first major transport routes. Whereas oceans acted as barriers in ancient times, in modern times they have been highways of travel and trade.