Answer:
So in short, the domino theory is an idea that neighboring countries will be effected by that country’s political ideology. This is most commonly used in context of the cold war, when the United States and Russia were competing for either Communism or Capitalism to be the used type of economic system. The United States government wanted to get involved with the Vietnamese war because they were afraid that if the Northern Vietnamese won the war, that the Southern Vietnamese would become communist.
If this is about Vietnam then the answer is C
The great rift valley in east Africa is being shaped by water due to erosion
Answer
B. The United States was prepared to use the Unit
Explanation
Communism is a system of social organization where all the property is owned by the community and each individual receives and contributes according to their abilities and needs.The heading mentions that the U.S troops were fighting communism in South Korea to tell the whole world that the U.S was against communism type of governance.