According to the text, what three main criteria shift depending on the definition of 'dirty'?

Answer

Visible filth, parasitic lifestyles, or volume of disease-causing agents.

The assignment of the 'dirtiest' title shifts depending on whether priority is given to visible filth, the nature of parasitic lifestyles, or the sheer volume of transmissible disease-causing agents.

According to the text, what three main criteria shift depending on the definition of 'dirty'?
insectdirtbug