In "ain't i a woman? ," why does truth repeat the phrase “ain’t i a woman? ” throughout the second paragraph?

I think this ties in with that fact that sojourner truth used to be a former slave. when she says "aint i a woman" repeatedly she is emphasizing that  she is a woman, one who is human and strong. that she is not the color of her skin, and she should be treated as who she is. 

-hope this helps

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.