[Solved] What involves not only the movement of ideas but also a mass shift of people that results in social and cultural changes on a large scale? A) invention B) diffusion C) migration D) reinvention Keyword: A significant word or phrase used in an information retrieval system to indicate the content of a document. Boolean Operator: A logical operator used in search engines, programming, and mathematics to perform logical operations such as AND, OR, and NOT. Wildcard: A character used in search functions to represent one or more other characters, facilitating flexible and broad search criteria. Adult Content: Material deemed suitable only for adults due to its explicit or mature nature, including but not limited to pornography and graphic violence.