Which classification describes the chemical type or composition of pesticides?

• A. Usage
• B. Hazard
• C. Color
• D. Chemical type

Answer: (D)

Classification by chemical type describes a pesticide's chemical composition and family, such as organophosphates, carbamates, pyrethroids, or chlorinated hydrocarbons. This grouping is based on shared molecular structure and mode of action, which helps predict how the chemical behaves, how it affects pests, and what safety measures might be needed for handling and exposure. In contrast, usage refers to what pests it targets and how it’s applied; hazard concerns toxicity and risk; color isn’t a standard descriptor of chemical composition. So describing the chemical type or composition best fits the concept described by the option.