
Answer: b. Expansion diffusion
Explanation:
Diffusion occurs when culture, ideas and people spread from their areas of origin into new regions, areas or continents. Â
Expansion diffusion is characterized by contact. For example, the people of new geographical locations are exposed to the teachings of a religion through contact with missionaries. Adoption of these religions outside their founding hearths may then occur. This is the same way that diseases are spread. Â