In the middle of a speech about wind turbines, Janelle notic…

In the middle of a speech about wind turbines, Janelle notices quizzical expressions on the faces of her listeners. She realizes they didn’t understand a term she used. In response, Janelle said, “Let me define that term and explain it to make sure it is clear.”  When she makes this statement, Janelle is: 

Skilled speakers use their hands and expressions to compleme…

Skilled speakers use their hands and expressions to complement their messages, pointing to people mentioned in the speech, making reinforcing motions to emphasize a point, or even smiling when telling a joke. These examples illustrate which principle of effective delivery: