Answer: 1) Repetition is used to emphasize the importance of freedom.
Step-by-step explanation: repetition is a literary device that consists in repeating the same words or phrases in a sentence or paragraph, in order to emphasize an idea or to create an impact in the reader. In the given excerpt from President Reagan’s Address at Moscow State University, we can see an example of the use of repetition in the line "The key is freedom—freedom of thought, freedom of information, freedom of communication" this repetition is used to emphasize the importance of freedom.