In Harlem during the Harlem Renaissance .....
The answer is, A. seafloor spreading occurs
This means "what benefits does the volcanic activity have for the population?" I would say that the main benefit of continental volcanic activity is the expulsion of ash which can enrich the soil and in the tropics make it good for growing coffee, for example, as it does in El Salvador.
I think the answer to your question, is Public Support. Hope it helps......
