Well, people started specializing in things and if they couldn't get something because they didn't know how to make it, they would trade for it. Fast forward 8000 years, companies like Coca Cola make coke and fanta and others can't make it because they're specialized for it. They trade for it with the entire world and other companies make things that Coca Cola owners buy.
The Korean War was caused because North Korea, China, and the Soviet Union all wanted the Korean Peninsula to be a communist area.
Answer:
I would go with the third one if im not wrong.
Explanation:
