Which federal agency provides educational materials related to gardening and domestic topics?

The Cooperative Extension Service is the correct answer because it is a nationwide network that provides research-based educational resources in various areas, including agriculture, gardening, nutrition, and domestic topics. Established by the Smith-Lever Act of 1914, the extension service aims to extend knowledge from land-grant universities to the public, thereby promoting effective practices in communities.

It addresses gardening and domestic topics by offering workshops, publications, and local events that help individuals learn about horticulture, sustainable gardening practices, and food preservation. The main mission of this agency is to enhance the quality of life and support community development through accessible educational programs.

In contrast, the other agencies mentioned have different roles that do not focus on gardening and domestic education. The National Bureau of Standards is primarily concerned with setting technical standards and enhancing measurement science. The Federal Trade Commission regulates consumer protection and competition in the marketplace, while the National Highway Safety Bureau focuses on road safety, vehicle regulations, and related policies. None of these agencies provide the direct educational resources related to gardening and domestic topics that the Cooperative Extension Service offers.