According to Kennedy, why was the time period during which this speech was given similar to that of the American Revolution?

Fighting a tyrannical foreign power

Explanation:

Assuming you mean JFK (best president of all time, absolute chad) he was likely talking about how the American people need to unite to fight the Tyranny of the USSR (very cringe and smelly, lots of dead serfs.) Also was probably talking about how it's important to value American ideals such as freedom and liberty. Likely because Communism was growing fast (also bad, no freedom and also basically the opposite of the American economy)

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)

a drastic rise in oil prices ended decades of postwar.