What does a "wind chill" factor measure?

The wind chill factor specifically measures the combined effect of wind speed and temperature on exposed skin. It accounts for how wind can accelerate heat loss from the body, making it feel colder than the actual air temperature. As wind increases, it carries heat away from the body more quickly than still air would. This phenomenon is particularly significant in cold weather, where wind chill can lead to a greater risk of frostbite or hypothermia even when the temperature itself isn't extremely low.

By understanding the wind chill factor, individuals can better prepare for outdoor conditions and understand the potential impact on human comfort and safety. This measurement is essential for meteorologists to provide accurate weather forecasts and advisories about cold weather risks. Hence, the correct answer captures the essence of how wind affects our perception of temperature and our physical well-being.