Final answer:
People moved to the Isle de Jean Charles for economic reasons and to participate in the fur trade.
Step-by-step explanation:
The two reasons why people moved to the Isle de Jean Charles were economic motives and the fur trade. The French were primarily interested in establishing commercially viable colonial outposts in New France, and they created extensive trading networks that relied on native hunters to harvest furs, especially beaver pelts, which were in high demand in France for making fashionable hats. The French also traded goods with the native tribes, following their customs and sometimes intermarrying with them.