Surface winds are in the troposphere, and jet streams are winds that are located in the stratosphere.
When the price per square meter is high, real estate companies will build higher buildings, resulting more densely populated cities. When land is cheap, as in smaller cities and villages, people tend to build lower buildings and therefore cities will be less dense.
Because many rivers run swiftly down int mountains.
Hope that helps
Floods cause landslides and mudflows
The shifting of the Earth's tectonic plates.
