The author organized the text into two sections to D. show readers that thinking about both the supply side and the demand side are important for water efficiency.
<h3>What is a text structure?</h3>
Text structure simply means the way that a text is organized in order to effectively convey the central idea.
In this case, the author organized the text into two sections to show readers that thinking about both the supply side and the demand side are important for water efficiency.