Individuals represented by the middle of the dose/response curve (responding to doses of 20 ppm) are ABOUT AVERAGE TO SENSITIVE for that population.
Step-by-step explanation:
The study of the lose and response curve of the population in the society is called toxicology. It is associated with the exposures to physical agents are chemical substances and other conditions.
In the modern society, it became the important element in the environment and occupational health; it concerns the factors and events that determine the relationship between the exposure, dose and response.
It relates to uptake and absorption and distribution. The assessment shows that the individual are in the middle of the lose and response curve is average to sensitive for that population.