While global health professionals understand that Cholera is an infectious disease caused by bacteria that is transmitted through contaminated water, global health professionals also understand that the root cause of Cholera is:.

Poor sanitation

Explanation:

Cholera is a disease caused by the bacteria Vibrio cholera which is usually found in the saline or brackish water. The bacteria obtain nutrients from the organic material present in the water.

The bacteria causes cholera disease which is transmitted through the contaminated water. The source of organic material present in the contaminated water is the faeces or human stool which provide nutrients to the bacteria.

Therefore the root cause of the disease is the faeces present in the contaminated water due to poor sanitation.

Thus, Poor sanitation is correct.