How do the concepts of "biracial" and "multiracial" relate to w.

e.

b. du bois notion of "color line"?

Biracial means that a person has two racial backgrounds. While multiracial, means that a person has multiple racial backgrounds. In the past, being called such has become a derogatory term years back as it connotes discrimination and insult, however, now, it is more accepted and even celebrated.