Which of the following is a recognized ecoregion source associated with SS Credit?

The US Environmental Protection Agency (EPA) is recognized as a reliable source for ecoregion information in relation to the Sustainable Sites (SS) Credit within the LEED BD+C V4 framework. The identification and assessment of ecoregions are essential for understanding the ecological context of a site and for informing sustainable practices in land use and site development. The EPA provides detailed classifications of ecoregions that help project teams evaluate the environmental impacts of their proposed projects and align them with sustainability goals.

Using information from the EPA enables projects to comply effectively with the SS Credit by ensuring that site design and maintenance strategies are suited to the ecological characteristics of the area. This includes understanding the local flora, fauna, soil types, and water resources, which are crucial for fostering sustainable ecosystems and minimizing disruption to the site's natural environment. The other sources mentioned, while reputable, do not specifically focus on ecoregion data in the context needed for this credit.