Which of the following does not apply to diversity matters?
a. gender
b. hair color
c. race
d. sexual orientation?

The correct answer is B. Hair color

Explanation:

In societies, the diversity refers to the co-existence of individuals with different features this includes gender, race, ethnicity and sexual orientation that during history have led to different issues as certain individuals or groups of people have more benefits over others or discrimination occurs due to certain features. However, hair color is not a feature that applies to diversity matters because even though in society individuals have hair of different colors this is not a factor that leads to diversity issues/problems or stops individuals from co-existing. Therefore, it is hair color the one that does not apply to diversity matters.