Final answer:
Expulsion refers to a subordinate group being forced to leave an area or country due to social or racial differences. This can occur historically or in modern contexts such as gentrification or segregation, resulting in displacement.
Step-by-step explanation:
Expulsion refers to a subordinate group being forced, by a dominant group, to leave a certain area or country. Expulsion can be based on social or racial differences and has often occurred historically with an ethnic or racial basis. Examples of expulsion include the Trail of Tears and the internment of Japanese-Americans during World War II. Expulsion can also occur through processes such as gentrification and segregation, which result in the displacement of specific groups from their homes and neighborhoods.