Which of the following organizations relates to non-profit voluntary agencies?

The American Diabetes Association is an excellent example of a non-profit voluntary agency because its primary mission is to support individuals affected by diabetes through education, advocacy, and research funding. As a non-profit organization, it operates to serve a public or community benefit rather than to generate profit for shareholders. The funds it raises go directly towards research, support programs, and initiatives aimed at improving the lives of those impacted by diabetes.

The other organizations listed have different structures and purposes. For instance, nursing boards are typically regulatory bodies that govern the licensing and practice of nurses within a specific state or region. The American Nurses Association is a professional organization that represents the interests of nurses but is not a voluntary agency in the same sense as the American Diabetes Association; it primarily focuses on advocacy and professional development for its members. The Health Resources and Services Administration is a part of the U.S. Department of Health and Human Services and primarily works on policy and funding for health care services, rather than the voluntary support aspect emphasized by non-profits.