repetition is\n\nsaying a word or phrase only once.\n\nsaying words or phrases many times\nfor…

Brief Explanations:

Repetition in language (a sub - field of Arts, specifically Linguistics) is a rhetorical device. It involves using the same word or phrase multiple times. This is done to create an impact, emphasize a point, or add a rhythmic quality. For example, in Martin Luther King Jr.'s "I Have a Dream" speech, the repetition of "I have a dream" is powerful. The first option "saying a word or phrase only once" is the opposite of repetition. The third option "saying many different words or phrases" does not describe repetition. The second option "saying words or phrases many times for effect" correctly defines repetition.

Answer:

saying words or phrases many times for effect.