What type of adjuvant aids in mixing in the spray tank?

Utility agents are specifically designed to aid in the mixing of various components within a spray tank. Their primary function is to enhance the compatibility of different formulation types and enhance the physical stability of the mixture. This ensures that the active ingredients and other components do not separate during the mixing process, maintaining a uniform solution that can be effectively applied.

Spray modifiers, while they can impact the performance of a spray, have a broader focus, often related to optimizing droplet size or adjusting the properties of the spray to control drift or enhance deposition on target surfaces. Surfactants are compounds that reduce surface tension and increase spreading and wetting, which can benefit the effectiveness of a pesticide or adjuvant but are not primarily for mixing. Penetrants are designed to facilitate the absorption of active ingredients into plant tissues rather than mixing within the spray tank.

Overall, utility agents serve a critical role in ensuring a well-mixed and stable spray solution, making them the correct choice for this question.