Answer:
Pollution prevention
Step-by-step explanation:
The water conservation strategy being used when a household uses eco-friendly cleaning products would be pollution prevention.
The cleaning of household materials generally generates wastewaters that somehow find their way into the water cycle of the environment. Eco-friendly products are those that do not harm the environment in any way and the use of eco-friendly cleaning products would ensure that the wastewaters generated from cleanings are minimally polluted, effectively conserving the water due to the environment.