Which group of people share a common ancestry as per the definition of race?

The correct answer highlights that race is often defined by shared physical characteristics that are passed down through generations, such as skin color, facial features, and hair type. This understanding of race emphasizes biological and physical traits that can be recognized across different populations.

In many discussions about race, the emphasis is placed on these observable characteristics, which can be influenced by geographic and historical factors. The classification of people based on physical traits is historically rooted and often used in social contexts.

The other options present definitions that do not align with the concept of race. For example, individuals from the same country may come from a diverse range of ethnic backgrounds and physical traits. Socioeconomic background is not indicative of a shared ancestry or physical characteristics but rather relates to financial status or social class. Lastly, stating that all humans share a common ancestry overlooks the distinctions made between different racial groups based on physical traits that the question directly inquires about.