How does this structure affect the standard of living in the western
United States?
A It protects the region’s natural wildlife habitats and ecosystems.
B It supplies the region with water and electric power.
C It fulfills the region’s demand for continuous job growth.
D It provides the region with improved access to mining.
A. It protects the region's natural wildlife habitats and ecosystems.
The structure described likely helps protect the environment in the western United States by supplying water and electric power. As a result, it helps maintain the natural habitats and ecosystems in the region, which can contribute to a higher overall standard of living by preserving the natural beauty and resources of the area.