Which of the following roles does the Department of Interior NOT handle?

The Department of the Interior plays a crucial role in the management and protection of the nation's natural resources and cultural heritage. This includes responsibilities such as the management of national parks, overseeing water resource management, and wildlife conservation.

National parks are preserved and protected by the National Park Service, a branch of the Department of the Interior, which focuses on maintaining the parks' natural beauty and providing public access. Water resource management involves overseeing the use and quality of water resources to ensure sustainability for both people and ecosystems, which falls under the jurisdiction of the Department. Wildlife conservation is also a major area of focus, with various programs and initiatives aimed at protecting wildlife species and their habitats.

In contrast, international trade regulation does not fall within the purview of the Department of the Interior. This responsibility typically lies with other federal entities, such as the Department of Commerce or the Office of the United States Trade Representative, whose focus is on promoting and regulating trade agreements and international market access. Therefore, the role related to international trade regulation is the one that the Department of the Interior does not handle.