Answer :
Final answer:
The remark in the KOSU airport METAR provides additional weather information. Some examples are 'AO2', 'SNE1658', and 'P0000'.
Explanation:
The remark in the KOSU airport METAR stands for 'remarks'. It is a section of the METAR report that provides additional weather information that may be relevant to pilots and meteorologists. In the given METAR report, some of the remarks include 'AO2' which denotes an automated weather station with a precipitation discriminator, 'SNE1658' which indicates snow ending at 16:58 UTC, and 'P0000' which means no precipitation in the previous hour.
