Final answer:
Rhetoric is the art of using language to persuade and convince others by appealing to ethics, logic, and emotions.
Step-by-step explanation:
Rhetoric, according to Webster and Heinrich, is the art of using language to persuade and convince others. It involves the use of various techniques such as ethos (appeal to ethics), logos (appeal to logic), pathos (appeal to emotions), and kairos (timeliness). Rhetoric can be seen in everyday communication, as well as in speeches, advertisements, and literary works.