I believe that the sections that answer the question are "We will not only defend ourselves to the uttermost..." and "With confidence in our armed forces..."
Answer: Unity is the key to well-being, strength, and resilience.
Explanation:
If this is the excerpt:
My dear Mr. President:
I was sitting in the audience at the Summit Meeting of Negro Leaders yesterday when you said we must have patience. On hearing you say this, I felt like standing up and saying, "Oh no! Not again."
I respectfully remind you sir, that we have been the most patient of all people. When you said we must have self-respect, I wondered how we could have self-respect and remain patient considering the treatment accorded us through the years.
17 million Negroes cannot do as you suggest and wait for the hearts of men to change. We want to enjoy now the rights that we feel we are entitled to as Americans. This we cannot do unless we pursue aggressively goals which all other Americans achieved over 150 years ago.
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The literary techniques I recognize are the following:
1) amplification - adding more words to a simple sentence to make it more valuable and understandable.
2) hyperbole - exaggeration
3) dramatic visualization
4) Imagery
5) Pathos - use for emotional appeal.</span>
The answer to your questions is D.
I hope this helps! <3