What was the significance of Uncle Carter in the Hatchet book?

Uncle Carter was the pilot who gave Brian flying lessons and ultimately left him alone in the wilderness when he suffered a heart attack. This event led to Brian's survival journey in the book "Hatchet," where he had to rely on his wits and resourcefulness to stay alive. Uncle Carter's actions served as the catalyst for Brian's transformation as a character, teaching him important lessons about perseverance and self-reliance.