Final answer:
Reading from a script or a teleprompter restricts the speaker's vocal variety.
Step-by-step explanation:
The statement that reading from a script or a teleprompter restricts the speaker's vocal variety is true.
When a speaker reads from a script or a teleprompter, they are more focused on following the written words, which can limit their ability to spontaneously vary their voice. This can result in a monotonous delivery that lacks vocal variety.
For example, imagine a news anchor reading a news report from a teleprompter. Their speech may be flat and without inflection because they are not able to freely express emotions or emphasize key points.