The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The metaphor "iron curtain" helps me to understand the situation Churchill describes in his speech in that it clearly exemplifies the meaning of the Berlin Wall built by the Soviet Union under the rule of General Joseph Stalin.
On March 5, 1946. former British Prime Minister Winston Churchill delivered the speech known as "the Sinews of Peace." He was visiting the United States and delivered his message at Westminster College, in Fulton, Missouri. He was invited by United States President Harry Truman.
In his speech, Churchill referred to the Berlin Wall as "the iron curtain" that divided the world and separated people.