How have the nations systems of mountains and waterways influenced the development of the united states

The waterways and mountains of the United States, much like the rest of the world, have had a significant impact on where people settled and how towns and cities interacted with one another. Large mountain ranges served as natural barriers between groups, causing distinct regional shared cultures to develop due to the relative isolation and shared geography that mountain ranges create. The opposite is true for rivers, which connected communities through ease of travel, trade, and shared access to water and other natural resources.  

cirrus clouds: lacy or wispy clouds that form at high altitudes it would generally happen before a change in the weather.