9. The windchill index tells you A. the temperature of the water during winter. B. how wind speed affects heating needs for structures. C. the amount of moisture in the air. D. how wind and temperature affect your body in winter.
The wind chill index tells you D. how wind and temperature affect your body in winter. Basically, it's how you perceive the cold weather on your skin regardless of what the temperature actually is. Hope this helped!
