Answer:
• The New World appeared worthless.
• The cost was too high.
• France was at war with England.
Explanation:
The French had extensive holdings in North America but they didn't think these areas held much value apart from the fur trade which was largely being replaced by cotton.
The cost of financing expeditions to the new world was also quite high as well as maintaining outposts in the new world. Seeing as the French did not see much value in the place, spending all that money made little sense to them.
The third and most important reason was the war with the British. After the British won the French and Indian war, they gained the ascendancy in North America such that the French could not impose themselves anymore.
For these three reasons, the French stopped paying for voyages and eventually sold off their lands in North America.
