What is defined as waste of human origin?

The correct answer pertains to the classification of waste associated with human activities. In this context, the term "waste of human origin" encompasses materials or substances generated from human use that result in an environmental impact.

Black water is specifically sewage and is characterized by being highly contaminated, including human waste, while grey water refers to wastewater from activities like bathing and washing, containing lesser contaminants. Soil, on the other hand, is not classified as waste but rather as a natural resource, essential for supporting plant life and various ecological processes. Solid waste is a broad term that includes various discards from human activity, but it does not denote a specific type of waste originating from humans alone.

Therefore, focusing on the official classification, black water is the category that aligns most closely with waste produced as a direct result of human activities. It is specifically defined as waste that contains significant human contaminants, distinguishing it from the other types mentioned.