Fitzpatrick IV is typically composed of which of the following ethnicities?

Fitzpatrick IV skin type is characterized by a moderate tan that can tan easily and rarely burns. This skin type often includes individuals from ethnic backgrounds that have a higher melanin content, providing more natural protection against UV radiation.

The ethnicities that commonly align with Fitzpatrick IV include Hispanic and Indigenous American populations. These groups often have skin that can tan with sun exposure, making it typical for this category. The feature of a balanced pigmentation allows for a wide range of tones, which are especially prominent in these ethnicities.

Other options mention ethnicities that typically align with different Fitzpatrick classifications. For instance, African and Caribbean skin types are generally classified higher in the Fitzpatrick scale, indicating a higher melanin concentration that results in even more resistant and darker skin. Caucasian and Mediterranean ethnicities often align with lower Fitzpatrick types due to lighter skin tones, while Asian and European ethnic groups would also cover a range of lighter skin characteristics, particularly in the case of many European populations. Hence, the choice of Hispanic and Indigenous American for Fitzpatrick IV is most aligned with its characteristics and traits.