Rhythm is defined as a set of ideas used to support a greater claim. a set of words used to make an effective point. a pattern of stressed and unstressed sounds. a pattern of speech or writing that supports a claim.

Rhythm is defined as a pattern of stressed and unstressed sounds.
It is the way something sounds, and it is usually a pleasing sound that you hear when you listen to something or read it out loud yourself. It has nothing to do with supporting a claim (unless your claim was about rhythm), so the other answers cannot be true here.

Abiography is a description of a real person's life, including factual details as well as stories from the person's life. biographies usually include information about the subject's personality and motivations, and other kinds of intimate details excluded in a general overview or profile of a person's life.