What are the three precautionary symbols that may appear on pesticide labels?

• A. Stop sign (high hazard), diamond sign (moderate hazard), yield sign (lower hazard).
• B. Circle sign (low hazard), triangle sign (high hazard), pentagon sign (moderate hazard).
• C. Octagon sign (warning), hexagon sign (danger), square sign (safe).
• D. Arrow sign (warning), star sign (hazard), circle sign (low hazard).

Answer: (A)

The test is checking how pesticide labels convey different levels of precaution with simple pictorial signs. The best answer uses three familiar traffic signs to show a clear order of hazard: a stop sign for the highest hazard, a diamond sign for a moderate hazard, and a yield sign for a lower hazard. This works well because these shapes carry immediate, universal meanings—stop demands urgent action, a diamond is a warning, and a yield sign indicates to proceed with caution but without urgency. Using these three symbols together gives a quick, at-a-glance sense of how dangerous the product is and what level of precautions are required. The other options rely on shapes and terms that aren’t standard or don’t convey the same escalating warning level, so they don’t fit the established way labels communicate risk.