Which mechanism most directly facilitates diffusion from urban centers to surrounding areas?

• A. Migration
• B. Plate tectonics
• C. Solar radiation
• D. Genetic drift

Answer: (A)

The mechanism being tested is how cultural elements spread from cities to nearby regions. Migration directly moves people who carry urban languages, practices, foods, and norms into surrounding areas. As these individuals settle, form communities, or influence neighboring towns, the urban traits they bring can become adopted locally, leading to diffusion outward from the city.

The other options don’t directly move culture in space. Plate tectonics reshapes the Earth's crust; it has no role in transferring cultural traits. Solar radiation affects climate and energy but doesn’t transmit culture from one place to another. Genetic drift alters allele frequencies within populations and relates to biology rather than the spread of cultural ideas or practices.