Final answer:
Repeating phrases for effect can be distracting to the audience. Speakers should avoid excessive movements and practice deliberate gestures.
Explanation:
Repeating phrases for effect would be the most distracting public-speaking behavior for an audience as it can make them feel dizzy. It is important for speakers to avoid excessive movements such as pacing, tapping, or exaggerated gestures, as these can detract from the message being conveyed. Additionally, practicing deliberate gestures that coincide with key points can help maintain audience engagement.
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