Which type of delivery is characterized by unintelligible speech?

The type of delivery characterized by unintelligible speech is indeed poor delivery. This form of delivery fails to effectively communicate the intended message to the audience. When speech is unintelligible, it undermines the clarity and engagement necessary for effective communication, leading to confusion and a lack of understanding among listeners. In contrast, excellent, average, and good delivery types emphasize clarity, coherence, and audience engagement, which are essential for ensuring that the audience grasps the content being presented. Thus, distinguishing poor delivery as one that features unintelligible speech highlights the importance of articulation and effective communication skills in any presentation.