Final answer:
Subtle discrimination is often not noticed because it includes behaviors and speech that express prejudice subtly, such as microaggressions or institutional policies.
Step-by-step explanation:
The type of discrimination that is often not noticed because the behaviors are seen as normal or natural is subtle discrimination. This type of discrimination includes behaviors and speech that can express prejudice without an individual's conscious intention. Examples include microaggressions, such as a drill team director insisting all members wear their hair straight, which may reflect underlying racial biases.
Similarly, institutional discrimination is present when societal systems, like policies or cultural norms, inherently disenfranchise certain groups. Overt forms of discrimination, like Jim Crow laws, are more easily recognized and not tolerated today, whereas subtle forms can be perpetuated unintentionally due to unconscious biases.