Final answer:
Education is not an example of an external or secondary dimension on the diversity wheel; it is an aspect of one's extended identity that can change over time.
Step-by-step explanation:
The question, "Which of the following dimensions is not an example of an external or secondary dimension on the diversity wheel?", pertains to the various aspects of diversity that are considered when looking at a person holistically. Age, gender, and race are usually categorized as primary or core dimensions of diversity, which are attributes that people carry throughout life and significantly affect their life experiences and opportunities. On the other hand, education is typically considered a secondary or external dimension because it can be altered throughout an individual's life and is not an innate characteristic. Therefore, education is not an example of an external or secondary dimension on the diversity wheel; it is, however, a part of an individual's extended identity.