Because station air pressure is a function of elevation, air pressure readings must be

converted to an equivalent sea-level value

Explanation:

Even though this question does not give the multiple answer options, this is your correct reply. Around the world, to measure station air pressure, there is an elevation to be considered when measuring. As a result, station pressure is adjusted to sea-level pressure (SLP) so as to have a constant value wherever the station may be.

this is a good question! i'll do some research and come back when i have the answer!