Answer :
In the passage provided, the underlined sentence is important because it shows that the floating classrooms also have positive effects for adults. This is significant as it highlights the broader impact of Rezwan's innovative approach beyond just helping students. By mentioning that some students are teaching their parents and grandparents how to read and write, it emphasizes the ripple effect of education within the community.
This underlined sentence underscores the importance of family and community in rural areas by showcasing how education is not limited to the classroom but extends to enriching the lives of adults as well. It demonstrates that the benefits of Rezwan's floating classrooms reach beyond the immediate student population, creating a more inclusive and interconnected learning environment.
Therefore, the underlined sentence is crucial in emphasizing the holistic impact of Rezwan's initiative, illustrating how education can empower not only students but also adults in the community, thereby highlighting the significance of family involvement and community support in rural areas.