Final answer:
The term not related to the manner or clarity of verbal message delivery is syntax, as it deals with the structure of written communication, not verbal delivery. Tone, volume, and pitch are all related to the delivery aspects of speech.
Step-by-step explanation:
The terms that refer to the manner or clarity in which verbal messages are delivered include tone, volume, and pitch, but not syntax. Syntax is the order or arrangement of words in a sentence, which impacts the structure of written communication rather than the manner of verbal delivery.
Tone reflects the attitude conveyed through a speaker's words, while volume pertains to the loudness or softness with which a message is spoken. Pitch, on the other hand, describes the highness or lowness of the speaker's voice. Each of these aspects can be adjusted to facilitate better understanding and engagement with the audience.
Overall, effective communication is not just about the words chosen (vocabulary) but also how those words are presented. This includes various elements such as tone, volume, pitch, rate of speech, and articulation, which work together to enhance the clarity and reception of the spoken message.