What type of additive is used in a spray mixture to help reduce drift?

The type of additive used in a spray mixture to help reduce drift is a Drift Control Additive. These are specifically formulated to modify the physical properties of the spray solution to help ensure that larger droplets are produced during application, which are less prone to being carried away by the wind. The primary function of these additives is to enhance droplet size and increase the weight of the spray droplets, allowing them to settle more quickly to the target area rather than being dispersed into the air. This is particularly important in pesticide application, where reducing drift is crucial for protecting non-target plants, wildlife, and minimizing pesticide exposure to humans.

The other options mentioned serve different purposes. Dry Flowable and Emulsifiable Concentrates refer to the physical formulations of pesticides rather than additives designed to modify the application characteristics. An Emulsifying Agent is used in formulations to help mix oil and water-based components but does not specifically address drift control. Thus, Drift Control Additives stand out as the appropriate choice focused on reducing drift during pesticide application.