What statement is true about pesticides used in structural pest control?

The true statement about pesticides used in structural pest control is that even the least hazardous pesticide can cause human harm. This emphasizes the inherent risks associated with pesticide use, highlighting that safety cannot be taken for granted. While some pesticides are labeled as "least hazardous," this does not imply that they are without risk.

This answer is grounded in the understanding that all chemicals, including those designated as less toxic, may still have the potential to cause adverse health effects under certain conditions, such as improper application, lack of protective gear, or sensitivity of individuals exposed. It underscores the importance of taking precautions and adhering to safety guidelines.

The other statements might suggest a false sense of security regarding pesticide safety. For example, suggesting that following label directions will guarantee no human exposure overlooks potential mistakes or unforeseen circumstances. Claiming that pesticides labeled with "CAUTION" are inherently safe may mislead individuals about the varying levels of toxicity and the need for caution even with less hazardous materials. While stating that the toxicity of most pesticides is low could minimize the real dangers associated with their use, all pesticides should be treated with care.