Which appliances contribute to wastewater in a home?

The answer focused on toilets and sinks is correct because these appliances are directly involved in the generation of wastewater in a household. Toilets transport human waste and flush water, making them a significant source of wastewater. Similarly, sinks are used for various activities such as washing hands, dishes, and food, all of which contribute additional wastewater to the home’s plumbing system.

The other options do not primarily contribute to wastewater generation. While dryers and dishwashers are listed, only dishwashers add wastewater, and even then, their primary purpose is not wastewater generation in the same way that toilets and sinks function. Heating systems and air conditioners generally do not contribute to wastewater in a way that affects a septic system; they might produce condensation, but this is minimal and not considered part of the household's wastewater output. Electric heaters and fans also do not play a role in wastewater production, as their function revolves around heating and ventilation rather than waste disposal. Thus, the role of toilets and sinks in managing human waste and everyday hygiene makes them the main contributors to wastewater in a home.