Answer: Surface-level diversity
Step-by-step explanation:
The surface level diversity is one of the concept that helps in explain the about the different types of characteristics such as ethnicity, gender, education and the background of the person.
The surface level diversity helps in distinguish between the various types of level based on the social categories for the purpose of exploring the characteristics and the complexity in the specific group.
It is basically distinguishable on the various types of psychological concept such as decision making process, personality and the cognitive behavior. Therefore, Surface-level diversity is the correct answer.