In the context of pesticide safety, "exposure" is defined as:

In the context of pesticide safety, "exposure" refers specifically to the time spent in proximity to pesticides. This definition encompasses not only physical presence near the pesticide but also the potential for harmful effects based on duration and frequency of exposure. Understanding exposure is crucial for assessing risk and implementing safety measures, as longer or repeated exposure to pesticides can increase the likelihood of negative health effects.

While the other options touch on relevant aspects of pesticide safety, they do not fully encapsulate the concept of exposure. For instance, contact with non-toxic substances does not pertain to pesticides or any potential harmful effects. The amount of pesticide present in the environment is related to environmental contamination or presence but does not specify how individuals interact with it. Lastly, although the total amount of pesticide consumed might indicate a level of exposure, it is more about ingestion than the general concept of exposure, which also includes skin contact and inhalation. Thus, understanding exposure in the context of time and proximity helps in implementing safety protocols effectively.