The observable demographic or physiological differences in people, such as their race, ethnicity, gender, age, and physical disabilities constitute diversity.

Surface level diversity

Explanation:

The surface-level diversity includes all the observable demographic factors which can be directly observed on the individuals. These factors includes the race, gender, age, size of the body, visible disabilities, and ethnic group to which one can be related to belong.

This is the basis of comparison between individuals and identifying a single individual from a population of individuals.