Which of the following is an example of an essential service related to sanitation?

Plumbing is indeed an essential service related to sanitation because it directly involves the distribution and removal of water, waste, and sewage, which are crucial for maintaining health and hygiene standards in residential and commercial properties. Proper plumbing ensures that clean water is readily available for consumption and that wastewater is effectively disposed of, thereby preventing the spread of disease and maintaining sanitary living conditions.

In contrast, while services such as monthly pest control, weekly trash collection, and window washing contribute to overall property maintenance and cleanliness, they do not directly pertain to essential sanitation services. Pest control helps manage infestations, trash collection keeps areas tidy, and window washing improves visibility and appearance, but they are not foundational components of sanitary living environments like plumbing is.