Why was the Cumberland Gap a good place for a trail?

The Cumberland Gap is one of the few crossable places in the entire lower Appalachians, making it a safe and convenient place to cross the Appalachians in many seasons.

Explanation:

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.