The spread of Islam to Central Asia and parts of South Asia illustrates which of the following concepts? Trade has little to do
with cultural diffusion. Ideas can easily spread from civilization to civilization. Countries that share the same religion also speak the same language. South Asians preferred religions traveling from the West more than those from the East.
A concept of federalism where local, state, and national governments interact cooperatively and collectively to solve common problems separately, but more or less equally (dual federalism). Hope this helps! :)
