Which action has come to symbolize the end of
the cold war?
(1) establishing the peace corps
(2) achieving a truce in the korean war
(3) tearing down the berlin wall
(4) improving united states relations with china

The action that has come to symbolize the end of the Cold War is 3. tearing down the Berlin Wall. The Wall had been formed by the Soviet Union to separate East Berlin (Soviet-controlled) from West Berlin (Western-controlled). Its fall allowed Berliners (and Germans) from the Eastern half finally make their way to the Western half.