Final answer:
The four main theoretical approaches that underpin the study of Ethnicity are Marxist, Structural Functionalism, Feminist, and Post-Colonialism.
Step-by-step explanation:
The four main theoretical approaches that underpin the study of Ethnicity are a. Marxist, Structural Functionalism, Feminist, and Post-Colonialism.
The Marxist approach focuses on the economic and class aspects of ethnicity, highlighting issues of exploitation and inequality.
Structural functionalism looks at how different ethnic groups contribute to the overall functioning and stability of society.
Feminist theory examines the intersection between gender and ethnicity, exploring how gender inequalities intersect with racial and ethnic inequalities.
Post-Colonialism focuses on the impact of colonialism and imperialism on ethnic identities and power dynamics.