Hazardous substances are dangerous substances while toxins are poisonous substances. Hazardous substances may cause harm to an individuals health; they include acute toxins such as cyanide; substances harmful after repeated or prolonged exposure such as mercury and silica, among others. Toxic substances can be poisonous or cause health effects.
The correct answer is D(<span>Neck, armpit, and groin). I took the test and know from personal experience.
</span>
According to the evolution theory, the first insects appeared about 400 million years BC in the Devonian Period.
