Which statement about pesticide toxicity is true?

The statement that pesticides can vary in toxicity to different organisms is accurate because toxicity is dependent on various factors, including the chemical structure of the pesticide, the dose, the route of exposure, and the specific characteristics of the organism being affected. For example, a pesticide that is highly toxic to insects may have little or no effect on mammals or birds, while a substance considered safe for humans could be harmful to aquatic life. This variability highlights the importance of understanding both the intended target organisms and the potential effects on non-target organisms, emphasizing the need for careful and responsible pesticide use.

The other statements present misconceptions. Not all pesticides share the same level of toxicity; it is inaccurate to claim they are equally toxic. The notion that only organic pesticides are safe fails to recognize that safety must be evaluated on a case-by-case basis, as some organic pesticides can still pose risks. Furthermore, suggesting that low toxicity equates to no risk is misleading; even low-risk pesticides can cause harm under certain conditions or with improper application. Therefore, understanding the relative toxicity of various pesticides and their specific impacts is crucial for safe and effective pest management practices.