In ancient times, mountains were used as a natural barrier (used for protection) from the weather and neighboring countries. They're neighboring countries may go into a "great depression" and seek for new natural resources. They may acomplish this by attacking near by villages, but if you were on the other side of the mountain from them, you were safe since it is very long and dangerous expedition.
Answer:
<em>Hi Todoroki Here!! </em>
Explanation:
According to the USGS, Missouri River stretches for 2,341 miles from source to mouth the river beats out the Mississippi River as the longest river in the US. The river starts flowing from the Rocky Mountains in Western Montana and drains into the Mississippi River.
<em>Your Welcome! UwU</em>
The most important factor that posed the greatest challenge to developing natural resources in Siberia was the climate. It poses a big problem because of the big layer of ice through out most of the year, in summer there's forming of wast marshlands, the ground becomes very unstable, there's big deposits of trapped methane which lately creates craters when released, in the winter temperatures know to drop to -50 or more...
It touches an area of the Czech Republic & SW Sweden also Belgium<span>, </span>Germany<span>, </span>Denmark<span>, </span><span>Poland and the Netherlands.</span>