Which Soviet action led to the threat illustrated on this map? A
The placement of nuclear weapons
installations in Cuba
B
Blockading foreign supply ships from
entering the Caribbean
D
The signing of an arms limitations treaty
С
Closing the border between East and
West Berlin

The map represents the placement of nuclear weapons  installations in Cuba as the Soviet action.

The Cuba revolution was initiated when Fidel Castro defeated Fulgencio Batista in the year 1959. This lead Cuba to get assistance from Soviet Unions in terms of finance and military power.  

The Cuba missile crisis happened in 1962 when the Soviets installed nuclear missiles there that increases the tense situation in the US and other small nations.

Therefore, the cold war situation is created between two superpowers that are the US and the Soviet Union.

Learn more about the Cuba missile crisis here:

link

Option: A. The placement of nuclear weapons installations in Cuba.

Explanation:

The Brinkmanship policy between the United States and the Soviet Union resulted in the Cold War. The connection between Cuba and Russia began during the Cuban Revolution in 1959 when Fidel Castro managed to defeat  Fulgencio Batista. During this period, Cuba received military and financial support from the Soviet Union. The Soviet place nuclear missiles in Cuba in 1962 which threaten the U.S. and other neighbouring countries.