The correct answer is D. Rhetoric
Step-by-step explanation:
The word "Rhetoric" refers to the techniques, strategies, and art of persuading the audience about a certain or action. This concept is closely connected to effective persuasion because by using rhetoric it is possible to effectively convince people to believe and idea or take an action suggested by the speaker. Additionally, in persuasion, the three main appeals include the logos, pathos and ethos and a wide variety of strategies that support the main objective of persuading the audience. Considering this, the word that describes effective persuasion is "Rhetoric" because the rhetoric refers to the strategies and techniques used to persuade.