True or False: All surfactants are adjuvants, but not all adjuvants are surfactants.

The statement is true because surfactants are a specific type of adjuvant that helps improve the effectiveness of herbicides by reducing surface tension, allowing the herbicide to spread and adhere better to the target plants. Adjuvants, a broader category, include any substance added to a formulation to enhance its performance, which can encompass surfactants, oils, and other compounds. However, not every adjuvant functions as a surfactant; instead, they can serve various roles such as improving mixing, increasing herbicide uptake, or enhancing stability. Therefore, while all surfactants are included within the broader classification of adjuvants, the reverse is not true, affirming the correctness of the statement.