Air will move from area X to area Y.
In general, air tends to move from areas of higher temperature to areas of lower temperature in order to reach thermal equilibrium. Since area X has the highest temperature (22ºC) compared to areas Y and Z (both at 18ºC), the air will flow from area X to area Y or area Z. However, the closest correct response would be to state that air moves from area X to the areas with the lower temperature (Y and Z).