What economic strategy can help homeowners keep their water bills low in Arizona?

Xeriscaping is the correct choice as it refers to a landscaping method that emphasizes water conservation. In Arizona, where water scarcity is a significant concern due to its arid climate, adopting xeriscaping can greatly reduce water usage and, consequently, water bills. By selecting drought-resistant plants, using mulch, and employing efficient irrigation techniques, homeowners can create beautiful outdoor spaces while minimizing reliance on water resources. This practice not only lowers water costs but also helps protect local ecosystems and promotes sustainable water management.

In contrast, installing swimming pools often leads to increased water expenses due to evaporation and the need for regular maintenance. Utilizing water softeners may not necessarily contribute to lower water bills, as these devices primarily address water quality rather than quantity. Finally, connecting to a municipal water supply can provide reliable access to water, but it may not inherently lead to lower bills if the homeowners do not adopt water-saving strategies. Thus, xeriscaping stands out as a proactive approach for cost-efficient and sustainable water use.