Answer the following question given this paragraph: 

Fresh water is also preserved by purifying wastewater. Wastewater is water that has been used for cleaning, washing, flushing, or manufacturing. It includes the water that goes down your shower drain and that is flushed down your toilet. Instead of dumping wastewater directly into rivers, wastewater can be purified at a water treatment plant ( Figure below ). When wastewater is recycled, waterborne diseases caused by pathogens in sewage can be prevented. What are some ways you can save water in your own house?.


Q: What do we call water that has been used for cleaning, washing, flushing, or manufacturing?

 Choices:

- Grey water

- sewage

- groundwater

- wastewater

A:
wastewater
