Complex sentence: As a young adult, Boone supplemented his farm income by hunting and trapping game, and selling their pelts in the fur m, h this occupational interest, Boone first learned the easy routes to the area.
Split into simpler sentences: As a young adult, Boone supplemented his farm income by hunting and trapping game, and selling their pelts in the fur market. Through this occupational interest, Boone first learned the easy routes to the area.