Answer:
1. The first American fur trading post was established by the John Jacob Astor's American Fur Company, and it was located next to present-day St. Louis, Missouri.
2. The person who owned the company was John Jacob Astor.
3. The name of this American fort was Fort Astoria.
4. The British company that established Fort Vancouver was the Hudson's Bay Company.
5. Fort Vancouver was located in the Pacific Northwest region of present-day United States and Canada, on the north bank of the Columbia River in what is now Vancouver, Washington.
6. Many of the people at Fort Vancouver came from England, Scotland, and other parts of Europe.
7. The main business of the trading forts was the trading of furs, especially beaver pelts.
8. Fur from beavers was made into popular items such as hats, coats, and gloves.
9. The fur era was over by the mid-1800s.
10. The fur era ended due to a number of factors, including the depletion of beaver populations in many areas, the increasing popularity of silk and other materials for hat-making, and the growing opposition to the fur trade by animal welfare activists.
11. The forts helped encourage the growth of other industries, such as agriculture and trade, even after the fur era.