The answer is AREA
length
It is misleading to use the mean as a descriptor of a data set when the median or mode would be more representative of the data set as a whole.
The 'foot' or the 'meter' would both do nicely.
Caption, title, headline, descriptor...
volume
the answer is area
The answer is AREA
Volume.
"Liters" is a unit of measurement in the metric system used to measure volume.
area
length
In computer programming, a file descriptor (FD) is an abstract indicator for accessing a file. The term is generally used in POSIX operating systems.
The term blue ice is a nice descriptor for Antarctica
Meter is more appropriate because there are no buildings taller than a kilometer.
Both are used, but I believe that the people are more correctly called Swedes and the appropriate descriptor for items from Sweden is Swedish.
It is a derived unit in which area may be measured.