Answer: She allows her hair to go back to its naturally curly state.
One of the first actions that shows that Beneatha is interested in her heritage is the fact that she allows her hair to grow in a natural way. This shows that Beneatha accepts her heritage, as well as herself, and that she refuses to adapt to Western standards of beauty. Throughout the play, Beneatha demonstrates this attitude in various ways, such as by the way she dresses, by how she refers to herself, and by her choice of partner.