Final answer:
Genuine enthusiasm and energy contribute to building competence in speakers through establishing credibility, engaging emotions, and using effective communication strategies.
Step-by-step explanation:
Genuine enthusiasm and energy demonstrated by speakers contribute to building competence through establishing credibility, engaging the audience's emotions, and effectively delivering the content. When speakers show passion and excitement for their subjects, it enhances their credibility by showing their expertise and knowledge.
Sharing personal experiences related to the subject can also enhance credibility and appeal to the emotions of the audience. Finally, using devices that draw attention to claims and effectively communicating with clear language and respectful behavior contribute to building competence through enthusiasm and energy.