Which of the following correctly describes an acute effect of pesticide exposure?

An acute effect of pesticide exposure is characterized by an immediate adverse reaction. This type of effect typically occurs shortly after exposure to a pesticide, meaning that symptoms can manifest quickly, often within minutes to hours. Acute effects may include symptoms like headaches, nausea, dizziness, or skin irritation, depending on the type and amount of pesticide involved.

In contrast, the other choices refer to different types of pesticide effects. Long-term behavioral changes, delayed chronic illness, and progressive organ damage all represent effects that might develop over a longer period rather than occurring immediately after exposure. Understanding the distinction between acute and chronic effects is crucial for assessing the risks associated with pesticide use and for ensuring proper safety measures are in place to protect applicators and the environment.