The most accurate statement regarding the similarity between the terms "tribe" and "ethnic group" is:
Both terms involve shared kinship, collective loyalty, and identical physical traits.
However, it's important to clarify that while both terms may involve shared kinship and collective identity, they are not strictly defined by identical physical traits, as physical characteristics can vary significantly within any given ethnic group or tribe. Additionally, these terms are not exclusive to any specific population or region, including Africa; they can apply to diverse groups worldwide.