A speech that tries to prove whether or not a statement is true or false is what kind of speech?

Richard received a comment on his speech evaluation sheet that said, "Great job of using

vocal variety to capture our attention and provide emphasis to important points." What type of comment did his instructor make? A. Positive Non-Descript B. Negative C. Positive Descriptive D. Constructive

Boundaries are not always clearly delineated; therefore, people’s fields of experience ______ at times.

a. overlap b. clash c. interact d. diminish