Question

how can people conserve water at home?
rinsing dishes with cool water instead of warm water
washing dishes only when the dishwasher is full
bathing pets with a hose instead of a bucket
eating fish bought from the store

Explanation:

Washing dishes only when the dishwasher is full reduces the number of water - consuming cycles. Rinsing with cool or warm water doesn't directly conserve water. Bathing pets with a hose uses more water than a bucket. Eating store - bought fish has no relation to water conservation at home.

Answer:

washing dishes only when the dishwasher is full