What is defined as waste of human origin?

The correct answer is based on the definition and origin of the waste in question. Human-origin waste refers specifically to material that comes directly from human activity, primarily through biological processes. In this context, solid waste encompasses a variety of materials that are discarded from human use and can be categorized into different types, such as organic waste, plastics, metals, and other materials derived from human consumption and activity.

Other options include different classifications of water. Black water refers to wastewater that contains human waste, such as sewage, and grey water is wastewater that does not contain fecal matter, typically from sinks, showers, and washing machines. Soil, while it can contain organic material, is not classified as waste of human origin in the same context as solid waste because it represents a natural resource and is not inherently discarded from human consumption.

Thus, solid waste is the appropriate term for waste that originates from humans, encompassing all types of discarded materials that arise from daily activities.