Martin Luther King Jr's inflection and tone of voice were appropriate for the occasion as he uses pause and pitch, which is the inflection.
This is known as a modulation or intonation or pitch in the voice and tone patterns in a person's speech, where the voice rises and falls.
Hence, we can see that beginning of his speech, I have a dream, the vocal strategies Martin Luther King, Jr. uses in his speeches are pause and pitch inflection.
Martin Luther Jnr at the beginning of his speech gave off an urgent, earnest tone to set his audience for his message while maintaining an overall passionate tone throughout.
His pauses were to emphasize his points and let the points sink in his audience's minds.
Read more about tone and inflection here:
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