Final answer:
The movement of pesticide in the air away from the target area is known as drift, which is different from runoff, leaching, or air pollution.
Step-by-step explanation:
The movement of a pesticide in the air away from the target area is usually called drift. This can occur during the application of pesticides when small droplets or particles are carried away from the intended target area by wind or air currents.
It's important to differentiate between other related concepts such as runoff, which is the movement of water, often from precipitation, across the land surface, potentially carrying pollutants like pesticides into waterways. Similarly, leaching refers to the process where chemicals, including pesticides and fertilizers, percolate through the soil with infiltrating water and can contaminate groundwater.
Air pollution is another key term, encompassing the spread of contaminants through the air, including the drift of pesticides.