Why did the US decide to help protect South Korea? O It gave the US a way to directly fight the USSR O The UN wanted to stop Japan's colonial expansion North Korea's invasion directly impacted many American lives Truman's policy of containment called for US support against communism.​

I think A.

Explanation:

North Korea was close to the USSR, so South Korea was probably the best option to fight the USSR at sonce it bordered North Korea.

Truman's policy of containment called for US support against communism.

Explanation:

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

food chain i would say only because there is competition on getting food and survival