Which waste is specifically mentioned as being discharged from showers, lavatories, and sinks?

The correct answer is grey water, which refers to the relatively clean wastewater that is generated from domestic activities such as bathing, washing dishes, and laundry. This type of waste is distinguished from other categories because it is not highly contaminated and can often be reused for purposes like irrigation or flushing toilets, depending on local regulations and treatment methods.

In the context of the question, grey water is discharged specifically from showers, lavatories, and sinks, making it the most relevant choice. This highlights its character as a significant component of household waste that carries residual soap, food particles, or personal hygiene products, but does not include harmful pathogens to the extent found in other waste types.

Solid waste typically refers to non-liquid waste, which does not include the liquid waste that is generated from the activities mentioned. Black water contains significant levels of waste and pathogens, primarily from toilets, and is considered heavily contaminated, making it a different category entirely. Stormwater is rainwater that can carry pollutants from surfaces but is not discharged from the daily domestic activities specified in the question.