Final answer:
Education is the good thing that the builders' return may provide for Rukmani's daughter.
Step-by-step explanation:
As Rukmani struggles to find something good about the builders, she believes that their return may provide something good for their daughter. This good thing is education. Education plays a crucial role in empowering individuals and opening up opportunities for a better future. By receiving an education, Rukmani's daughter can acquire knowledge and skills that will enable her to pursue her dreams, gain employment opportunities, and have a brighter future.