Of all the kinds of speechmaking, speaking is the most complex and the most challenging.

"Persuasive" speaking is the most complex and the most challenging.

A persuasive speech means when someone in front of an audience is presenting his or her point of view with the goal to persuade them to accept his/her ideas. His kind of discourse is pre-planned to target the audience to comply with all what is said.

answer; control group;

answer; passive listening;