What is the definition of 'pesticide toxicity'?

The term 'pesticide toxicity' refers specifically to the degree to which a substance can cause harm to humans, animals, or the environment. Understanding toxicity is crucial for ensuring safety in the use of pesticides, as it helps determine the potential health risks associated with exposure to these substances. Assessing toxicity involves looking at factors such as the concentration of the pesticide, the route of exposure (inhalation, skin contact, ingestion), and the duration of exposure.

On the other hand, the other options do not accurately capture the concept of pesticide toxicity. Effectiveness relates more to how well a pesticide performs its intended function rather than its harmful effects. Cost-effectiveness pertains to the economic viability of using a pesticide, which does not account for toxic impacts. Finally, application methods focus on how pesticides are applied rather than the biological effects they might have on living organisms or ecosystems. Thus, the correct choice provides a comprehensive understanding of the inherent risks posed by pesticide chemicals.