What equation reflects the relationship between pesticide safety concerns?

• A. Hazard = Toxicity X Exposure
• B. Exposure = Hazard / Toxicity
• C. Risk = Dose - Exposure
• D. Toxicity = Hazard + Exposure

Answer: (A)

Hazard comes from both how toxic a pesticide is and how much exposure people or the environment have to it. The best way to express that relationship is hazard equals toxicity times exposure. Multiplying these two factors shows that the overall potential for harm grows when either the chemical’s toxicity or the amount of contact increases, and drops to zero if either factor is zero. This is why reducing exposure or using less toxic products are effective safety strategies.

The other options don’t fit because they misstate how these factors relate: exposure isn’t determined by hazard divided by toxicity, and risk isn’t simply a subtraction of exposure from dose. Toxicity is an inherent property of the chemical, not something you add to exposure.