What must be printed on the label of a pesticide in Toxicity Category?

The correct response is based on the classification system used for pesticides, which categorizes their toxicity levels to inform users about the potential dangers associated with their use. The label "Danger skull and crossbones" indicates that the pesticide has a high level of toxicity and poses an imminent threat to human health if exposure occurs. This warning is crucial for ensuring that anyone handling or using the pesticide is acutely aware of its hazardous nature.

Labels marked with "Danger skull and crossbones" are designed to compel users to exercise extreme caution and to implement safety measures, such as wearing protective gear and following all usage instructions carefully. This labeling is part of regulations aimed at reducing the risk of accidental poisoning or injury from hazardous substances.

While other labels such as “Warning” and “Caution” exist for pesticides with lower toxicity levels, they don't convey the same immediate risk signified by the skull and crossbones symbol. "Keep away from children" is an important safety message but does not specifically classify the toxicity of the pesticide itself. It is a precautionary step rather than an indication of the chemical's toxicity category.