Which environmental factor includes societal attitudes and perceptions?

The correct choice is C, as societal attitudes and perceptions directly fall under the category of "attitudes." This environmental factor encompasses how society views various issues, including disability, mental health, and inclusivity. These attitudes can significantly influence individuals' access to resources, support, and overall opportunities for participation in societal activities. For example, positive societal attitudes can lead to more inclusive environments and increased support for individuals facing barriers, while negative perceptions can result in stigma and discrimination, ultimately affecting a person's ability to achieve their goals.

In contrast, support and relationships revolve around the personal connections and social networks available to an individual. While they can be influenced by societal attitudes, they are more focused on interpersonal dynamics rather than the broader societal perceptions. Services and systems refer to the formal and informal structures in place to assist individuals, whereas the natural environment pertains to the physical aspects of an individual's setting, such as accessibility of buildings or green spaces. Thus, while these elements are important, they do not specifically encapsulate societal attitudes and perceptions as a defining factor.