Answer:
They are literate and independent-minded
Explanation:
Arjun becomes the spokeman for the striking tannery workers (independent-minded). He was a good student inschool as well (literate). The rest of Ruku's son's who worked at the tannery followed Arjun.
Thambi and Arjun are known as the tannery's trouble makers.
Also I took the test :)
