What does the “iron curtain” refer to?

the border between the Soviet satellite states and Western Europe

the promise to help nations struggling against communist movements

the 46-year rivalry between the United States and the Soviet Union

the independent nations under the control of a more powerful nation

Explanation:the cold war border between democratic western europe and communist eastern europe

Right

The border between the Soviet satellite states and Western Europe.

Explanation:

The phrase "Iron Curtain" was formulated by the British prime minister Winston Churchill. It referred to the heavily guarded borders of communist states with Western European nations, and to the lack of democracy and freedoms in those nations, which citizens could not easily leave.

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.