Air moves from areas of higher temperature to areas of lower temperature. In the given data:
- Area X has a temperature of 22ºC
- Area Y has a temperature of 18ºC
- Area Z has a temperature of 18ºC
Since areas Y and Z both have the same temperature, they will not exchange air. However, air will move from the warmer area X to the cooler areas Y and Z.
Thus, the correct completion for the statement is:
Air will move from area X to area Y or area X to area Z.