The art of using language to inspire others to take action is called​oxymoronidiomsrhetoricmetaphors

The correct term for the art of using language to inspire others to take action is rhetoric. Rhetoric is a technique of using language effectively and persuasively in spoken or written form. It is used in various fields, including politics, marketing, and public speaking, to influence and motivate audiences through emotional appeal, logical argument, and stylistic choices.

Oxymorons and metaphors are figures of speech but don't specifically refer to the art of persuasion. Oxymorons juxtapose contradictory terms, while metaphors figure one thing as another to illustrate a point without using "like" or "as." Idioms are expressions whose meanings aren't predictable from the usual meanings of their constituent elements. In summary, rhetoric is the skillful employment of language to effectively communicate and inspire action, making it essential for impactful communication.