Question

in \aint i a woman?\ why does truth repeat the phrase \aint i a woman?\ throughout the second paragraph?

that man over there says that women need to be helped into carriages, and lifted over ditches, and to have the best place everywhere. nobody ever helps me into carriages, or over mud-puddles, or gives me any best place! and aint i a woman? look at me! look at my arm! i have ploughed and planted, and gathered into barns, and no man could head me! and aint i a woman? i could work as much and eat as much as a man - when i could get it - and bear the lash as well! and aint i a woman? i have borne thirteen children, and seen most all sold off to slavery, and when i cried out with my mothers grief, none but jesus heard me! and aint i a woman?

to suggest that audience should worry about her
to reinforce the idea that men should be more helpful
to suggest that females are tougher than males
to reinforce that she is strong, resilient and female

Explanation:

Truth uses the repeated phrase to contrast her experiences of hard labor, endurance of violence, and maternal grief with the stereotypical view of women as fragile and needing help. Each repetition ties her acts of strength and resilience to her identity as a woman, pushing back against the idea that women are inherently weak.

Answer:

to reinforce that she is strong, resilient and female