based on the context of each excerpt from john snow's "on the mode of communication of cholera," choose the definition that most closely matches the meaning of the bolded word. I found, moreover, that the water varied, during the next two days, in the amount of organic impurity, visible to the naked eye, on close inspection, in the form of small white, flocculent particles; in 1817, the cholera prevailed with unusual virulence at several places in the delta of the ganges; and, as it had not been previously seen by the medical men. A consideration of the pathology of cholera is capable of indicating to us the manner in which the disease is communicated. Severity arrow right the science that studies the causes of diseases arrow right occurring in the form of loose or soft fragments arrowright