Which of the following is a concern when discussing environmental chemicals?

The concern regarding environmental chemicals primarily revolves around their potential to alter hormone function. Many chemicals found in the environment, such as certain pesticides, heavy metals, and industrial pollutants, have been shown to interfere with endocrine systems in various organisms. This disruption can lead to a range of health issues, including reproductive problems, developmental disorders, and even impacts on behavior. Hormones regulate numerous biological functions, and any alteration can have profound effects on both individual organisms and entire ecosystems.

The other options present perspectives that do not align with the established understanding of environmental chemicals. For instance, claiming that they are always beneficial to health contradicts numerous studies that highlight the harmful effects of many environmental contaminants. Similarly, the assertion that these chemicals have no impact on wildlife overlooks the documented evidence of environmental toxins affecting animal populations, biodiversity, and ecological balance. Finally, limiting the effects to only large mammals fails to recognize that many chemicals can impact a wide range of species, from microorganisms to birds and fish, illustrating a broad ecological concern.