The correct answer is - Cold War.
The rivalry between the two biggest powerhouses in the world, the United States and the Soviet Union, was known as the Cold War. The Cold War period is a period of great rivalry, tension, threats, arms race, space race, technological race, pretty much direct and intense competition in everything in order to prove the world, and the opponent, that they are the better one, the strongest one.
Luckily, this 46 year long period, even though with few situations being right on the edge, didn't resulted in another war, because if it did, it was going to be much worse than the World War II by far.
The reasons why decolonization took place are many and complex, varying widely from one country to another. Three key elements played a major role in the process: colonized peoples' thirst for independence, the Second World War which demonstrated that colonial powers were no longer invulnerable, and a new focus on anti-colonialism in international arenas such as the United Nations.
I have no idea what the last thing is trying to say, but the first three answers would be correct!
Umm i dont get the answer sorry but help u with what u need an attachment