Shifting which factor makes potential drift predictable?

• A. Inversions
• B. Humidity
• C. Wind speed and direction
• D. Temperature

Answer: (C)

Drift is driven by how air carries droplets after application. The wind’s speed and direction determine how far droplets travel and where they go. When the wind shifts, the path that spray droplets will take shifts with it, so being able to observe and anticipate those wind changes makes drift patterns more predictable. Other factors like humidity or temperature can influence droplet size and evaporation, or air density and stability, but they don’t control the movement of the droplets as directly as wind does. So, changes in wind speed and direction are the key factor that allow you to predict where drift could occur.