Final answer:
A pilot can determine whether a wind shear condition exists by observing changes in wind speed and direction. They can use instruments like windsocks, anemometers, or wind vanes to detect wind shear.
Step-by-step explanation:
A pilot can determine whether a wind shear condition exists by observing changes in wind speed and direction as the aircraft approaches or leaves the runway. Wind shear refers to a sudden change in wind speed or direction. To detect wind shear, the pilot may rely on various instruments, such as windsocks, anemometers, or wind vanes, located near the runway. If the wind speed or direction changes significantly, it indicates the presence of wind shear.