Answer:
The Rockies impacted the ability of settlers to travel to the West coast of the United States.
Explanation: ^^
Answer:
Due to the fact that the Rocky Mountains and the Appalachian Mountains make it harder for settlers to get pass those regions, there was more settling in the spaces of the East and West coast before the mountains. It wasn't until the train became common that settlers finally started moving past these mountains.
Explanation:
