Which construction is more correct when in comes to comparing the height of a specific place to the sea level?
- This place is 100 feet above the sea level.
- This place is 100 feet higher than the sea level.
- This place is 100 feet upper than the sea level.
and
- This place is 100 feet below the sea level.
- This place is 100 feet lower than the sea level.
- This place is 100 feet under the sea level.
Which pair words do you normally use in such a context?