Which of the following signals a moderately toxic pesticide?

The correct designation for a moderately toxic pesticide is indicated by the term "WARNING." This label indicates a level of toxicity that is considered to be moderate; it suggests that the pesticide poses some potential risk to health but not to the extreme level associated with higher toxicity classifications.

The use of "DANGER/POISON" is reserved for highly toxic substances where exposure can lead to severe health consequences or death, necessitating stringent safety precautions. Conversely, "CAUTION" is assigned to products that have low toxicity, indicating that they pose minimal risk to health if used as directed. The term "SAFE" would suggest there are no associated risks, which does not accurately apply within the toxicity classifications for pesticides. Therefore, "WARNING" is the only classification that properly identifies a moderately toxic pesticide, aligning with the established guidelines for hazardous materials.