Final answer:
Biologically speaking, there are no real racial categories in humans. Each human trait varies along a spectrum, making racial distinctions inaccurate. Skin color, facial features, and skull shape vary widely among individuals.
Step-by-step explanation:
Biologically speaking, there are no real racial categories in humans. Each human trait varies along a spectrum, and the various traits are mixed and matched among people in ways that make racial distinctions impossibly inaccurate. Skin color, which is the most common way people assign race, varies along a spectrum from pinkish beige to dark brown, with people throughout the world having skin of every possible shade in between. Other features like facial features and skull shape also vary widely among individuals.