Final answer:
The claim that all pesticide labels must contain the warning 'Caution' is false. Pesticide labels are categorized into 'Caution,' 'Warning,' or 'Danger' based on their level of toxicity.
Step-by-step explanation:
The statement that the warning "Caution" should be on all pesticide labels is false. Pesticide labels contain different levels of warnings based on the product's toxicity.
The U.S. Environmental Protection Agency (EPA) requires one of three signal words on pesticide labels: "Caution," "Warning," or "Danger," with "Caution" representing the lowest level of toxicity, "Warning" for moderate toxicity, and "Danger" for products that are highly toxic or can cause severe eye damage or skin irritation.