Answer:
The 2,200-mile east-west trail served as a critical transportation route for emigrants traveling from Missouri to Oregon and other points west during the mid-1800s.
Explanation:
Answer: I think your answer is filtering, redacting, blocking, and censoring
Answer:
The Bolivian war of independence gained independence from Spain.
America gained independence from Britain
Brazil gained independence from United Kingdom of Portugal.
Argentina gained independence from Spain.
Gran colombia gained independence from Spain.
im really not sure how to help but those are some of the countries listed and where they gained independence from
Telescope
Thermometer
Air pump
submarine