Final answer:
Martin Luther King Jr.'s speaking style is best described as Inspirational, characterized by its ability to motivate and emotionally engage audiences, along with a poetic and rhythmic delivery that echoed his background as a preacher.
Step-by-step explanation:
The word that best describes Martin Luther King Jr.'s speaking style is Inspirational. Dr. King's speeches, particularly his famous "I Have a Dream" address, were known for their eloquence and their ability to inspire and mobilize people towards the cause of civil rights. His speaking style was poetic and rhythmic, reflecting the cadences of a preacher, which served to draw listeners in. However, it was the content of these speeches, filled with a vision of equality and justice, that truly inspired his audience and the broader society.
Dr. King's approach to speaking was notable for its prophetic rhetoric, which included appeals to biblical imagery and a vision of a more just society. His speeches were not merely persuasive in an argumentative way but were crafted to stir the emotions and the conscience of the nation. This emotional and moral appeal, combined with his charismatic delivery, made his speaking style truly inspirational.