How do pesticides commonly enter the body?

Pesticides can enter the body through multiple pathways, making option A the correct choice. The most common routes of entry are through the skin (dermal contact) and inhalation. Many pesticides are designed to target pests effectively, but they can also be absorbed by humans through the skin, particularly if there are cuts or abrasions, or if protective clothing is not worn. Inhalation occurs when airborne pesticide droplets or particles are breathed in, which is especially likely during the application of pesticides in agricultural or pest control settings.

The other options present limited routes of exposure. For instance, stating that pesticides enter the body only by swallowing excludes the significant risks associated with dermal absorption and inhalation. Similarly, claiming entry occurs only through inhalation disregards the fact that skin contact can be a major pathway, especially when handling or applying pesticides. By understanding these various routes of entry, individuals can take appropriate precautions to minimize their risk of exposure.