How did the railroad facilitate population growth in the interior of the country?

The railroad brought more people to the West, which pushed the government to help citizens settle more land. The railroad helped move goods from the West to markets in the East, fueling the nation's economy. The railroads provided employment to many early settlers, enabling them to improve their standard of living.

allowed people and goods to move west

Explanation:

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

sorry i tried to but i didn’t get it