Which pesticide formulation dissolves in water to become a true solution?

The correct answer is the Water-Soluble Concentrate formulation. This type of pesticide formulation is designed to completely dissolve in water, resulting in a true solution. When mixed with water, the active ingredient within the Water-Soluble Concentrate breaks down into individual molecules that disperse evenly throughout the liquid, creating a homogeneous solution.

This property is essential for applications where uniform coverage and consistency of the pesticide's effectiveness are critical. True solutions typically do not separate or settle over time, ensuring that the product remains evenly mixed until application.

Other formulations like Wettable Powders and Water-Dispersible Granules suspend in water but do not form a true solution. Instead, they require agitation to keep the particles evenly distributed in the liquid, as they can settle over time if left undisturbed. Waterproof is not a recognized pesticide formulation in the context of solubility and is more related to the characteristics of a product regarding resistance to moisture or water conditions.