Which of the following is NOT a signal word you might find on a pesticide label?

The correct answer is "Warning Sign" because it is not a recognized signal word used on pesticide labels. Pesticide labels typically include three primary signal words to indicate the level of hazard associated with the product: "Caution," "Warning," and "Danger." Each of these words conveys important information about the potential toxicity and safety precautions necessary when handling and applying the pesticide.

"Caution" is used for products with low toxicity, "Warning" indicates moderate toxicity, and "Danger" denotes high toxicity situations, requiring the most stringent safety measures. However, "Warning Sign" is not a standard term used in this context and does not appear on pesticide labels as a hazard classification signal word. This distinction reinforces the importance of understanding the meaning of the signal words present on labels to ensure safe pesticide use.