Which of the following is classified as a formal resource?

Formal resources are those that are officially recognized, structured, and typically have a defined role within an organization or system. In this context, teachers serve as formal resources because they possess qualifications, training, and professional standards that enable them to educate and guide students in a structured environment. Their role is institutional and regulated, providing a clear, formal relationship to the educational system.

In contrast, community friends, local parks, and volunteering groups represent more informal resources. Community friends may offer support or assistance but do not have a defined official role, making them informal. Local parks are natural resources that serve a community function, but they are not classified under the same formal structure as educators. Volunteering groups, while organized, are usually informal and variable in their structure and purpose, lacking the official recognition that characterizes formal resources like teachers.