Which pesticide formulation consists of solid particles dispersed in a liquid?

The correct choice, which indicates that the pesticide formulation consists of solid particles dispersed in a liquid, is a suspension. In a suspension, solid particles are not dissolved but are instead evenly distributed throughout a liquid medium. This characteristic is crucial in the context of pesticide formulations, as it allows for the active ingredients, which are often solids, to be effectively applied in a liquid state. This ensures that the particles remain in suspension and are evenly distributed when the pesticide is applied, allowing for consistent coverage and effectiveness.

In contrast, an emulsion consists of two immiscible liquids, where one is dispersed in the other, typically requiring an emulsifier to stabilize the mixture. Granules, on the other hand, are solid particles that require moisture to activate and are not a dispersed liquid formulation. Solutions, in this context, refer to a homogenous mixture where the solute is completely dissolved in the solvent, which does not involve solid particles being suspended in a liquid. Thus, among the given choices, a suspension is specifically identified as containing solid particles dispersed within a liquid, making it the appropriate answer.