Final answer:
The act of a dominant group removing a less powerful group from their land is known as ethnic cleansing, which often includes persecution and can be associated with genocide.
Step-by-step explanation:
When the dominant group removes a less powerful group from their land, this act is known as ethnic cleansing. Ethnic cleansing refers to the forced removal of a people from their homeland by a stronger force and may include actions that tend to break up a region into small, hostile units, or even involve attempts to eliminate an ethnic group.
While genocide specifically refers to the deliberate killing of a large group of people, especially those of a particular ethnic group or nation, both genocide and ethnic cleansing can entail severe persecution and discrimination against a subordinate group, including dehumanization, expulsion, and other forms of violence and harassment.