Answer:
C. Emotional appeal.
Step-by-step explanation:
"Tear Down This Wall" was a speech delivered by the 40th President of the United States, Ronald Reagan. The speech was delivered as a plea to Mikhail Gorbachev to tear down the wall of Berlin that separated East and West Berlin.
In the given excerpt, Reagan has used emotional appeal (pathos) to appeal to his audience. By using words such as 'courage', sentiment', 'love', etc Reagan is igniting emotions in the hearts of his audience.
Therefore, option C is correct.